Onboarding Linux Client (DEEPIN) to Microsoft Azure Threat protection ATP using ubuntu repository

Installing Microsoft Azure Threat Protection (ATP) on Linux Devices

While playing with ATP on some windows devices, I was in the mood of trying the new Deepin 20 desktop flavor which is a famous Chinese Linux OS based system.

Microsoft doesn’t indicate anywhere that installation of ATP on a Linux client is possible but Linux server is mentioned in the official ATP installation documents.

How to Install?

After I installed the Deepin OS, I was really impressed by the new beautiful Linux design so I plan to use it and have it secure with ATP.

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Prerequisites:

  1. Configure the Linux software repository for Ubuntu and Debian
  2. Application Installation
  3. Download the onboarding Package
  4. Client Config

1-Configure the Linux software repository for Ubuntu and Debian

You will need to install the required libraries, install Gpg, apt-transport-https and update repository metadata using the following commands one by one.

  • sudo apt-get install curl

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  • sudo apt-get install libplist-utils

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  • sudo mv ./microsoft.list /etc/apt/sources.list.d/microsoft-ubuntu.list
  • sudo apt-get install gpg

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After successfully installing all the libraries, I will go ahead and install the application

2- Application Installation

From the Linux client Terminal using sudo power user run the following script

sudo apt-get install mdatp

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Once finished, You can go back to the ATP portal and download the Linux Onboarding package on the linux server/client you want to onboard

3- Download the onboarding Package

Since I am doing a single deployment not bulk, then I will go to the Microsoft Defender Security Center’s setting page and download the Linux package from the device management section.

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The steps for the onboarding is already mentioned on that page so after you download the script you’ll know exactly what to do next.

The file is 9kb python in size

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Copy the file to your Linux Desktop

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4- Client Config

From the terminal type in chmod a+x MicrosoftDefenderATPOnBoardingLinuxServer.py and hit enter

Note: python must be installed on this linux dervice.

Then type python /MicrosoftDefenderATPOnBoardingLinuxServer.py

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This will run pretty quick and will assign your Linux server/client with your Organization ID.

To see the Organization ID type:

mdatp –health orgId

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Few minutes later you’ll be able to see the installation completion and the status through this command

Check if WDATP is functioning as expected

mdatp –health healthy

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Check if WDATP agent is enabled

mdatp –health realTimeProtectionEnabled

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Let’s check on our ATP portal and see if the machine is showing there.

Note: It might take 5-15 mins to update the definitions of WDATP when onboarding.

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Running a detection Test:

curl -o ~/Downloads/eicar.com.txt https://www.eicar.org/download/eicar.com.txt

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In few seconds the file has disappeared

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Checking for threats

mdatp –threat –list –pretty

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Let’s see this on the ATP Portal

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This is just a test malware not a real one therefore it wont harm your machine at all.

Hope this helps you with your deployments

Ref:

https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-atp/linux-install-manually

Deepin 20 Beta version

https://www.deepin.org/en/2020/04/15/deepin-20-beta/

Microsoft Exchange 2010 SP3 Link HACKED

Update: Microsoft replied to me and fixed the link. see screenshot below

WATCH Microsoft Exchange URL Hacked

If you have Exchange 2010 SP3 and planning to download the latest Rollup , Google will take you to the following link

https://www.microsoft.com/en-us/download/details.aspx?id=100910

Once you click on that link to download the RollUp update, You might want to check the system requirements links and that would list two main links

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The Exchange 2010 Prerequisites link will first redirect you to this URL which has an expired certificate.

http://www.microsoftpinpoint.com/

And that will then redirect you to this link (Seems to be a Chinese website)

http://123.wo80.com/

Luckily the antivirus managed to catch and block this page however, on any server that’s not running any antivirus this would certainly infect the server.

Phishing Alert!

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Video here

Contacting Microsoft

After I got in contact with Microsoft about the issue. Microsoft replied stating they have informed their security team and fixed the issue.

Azure RDWEB page is blank when accessing it with authorized users

Blank page on RDWeb for users

When you have finished deploying Azure WVD machines and added those machines in the correct hosts you might fall into this error by a chance and not easily be able to understand or see it.

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During the creation of Host Pools and AppGroups you might want to create your own fancy Host pool names and app group names, This is something normal but not when you want to use Azure WVD.

What Happens?

When you create an app group name other than the ones already existing (Desktop Application Group) you have to make sure that you would type this group name into the ARM Template since while deploying the VMs and typing the template would choose the default Application Group Name.

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Error 1

The connection to the remote PC was lost. This might be because of a network connection problem. If this keeps happening, ask your admin or tech support for help.

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Error 2

User is assigned to the wrong Application Group

add-RdsAppGroupUser : The specified UserPrincipalName is already assigned to a RemoteApp AppGroup in the specified HostPool.

ActivityId: feb39a7b-b74f-49d3-a100-1fc22ec66454

Powershell commands to diagnose the failure:

Get-RdsDiagnosticActivities -ActivityId feb39a7b-b74f-49d3-a100-1fc22ec66454

At line:4 char:1

+ add-RdsAppGroupUser -TenantName cagriandMoh10ly -HostPoolName WVD-Hos …

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo : FromStdErr: (Microsoft.RDInf…RdsAppGroupUser:AddRdsAppGroupUser) [Add-RdsAppGroupUser], RdsPowerShellException

+ FullyQualifiedErrorId : UpnAlreadyHasRemoteAppAssignment,Microsoft.RDInfra.RDPowershell.AppGroupUser.AddRdsAppGroupUser

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Solution:

Remove the user from the other application group and add him to the one where you have your RdsSessionHost that you would like your users to access.

Connect to Azure-AD first and run the following command, Make sure you specify the AppGroupName that you want to remove your users from and the AD Group that’s relevant to those users.

foreach($UPN in (Get-AzureADGroupMember -ObjectId ((Get-AzureADGroup | Where-Object DisplayName -Like “WVDUsers”).ObjectId)).UserPrincipalName)

{

Write-Output $UPN

Remove-RdsAppGroupUser -TenantName cagriandMoh10ly -HostPoolName WVD-Host-Pool01 -AppGroupName “Desktop App Group” -UserPrincipalName $UPN

}

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Add the Users again and see what happens

foreach($UPN in (Get-AzureADGroupMember -ObjectId ((Get-AzureADGroup | Where-Object DisplayName -Like “WVDUsers”).ObjectId)).UserPrincipalName)

{

Write-Output $UPN

Add-RdsAppGroupUser -TenantName cagriandMoh10ly -HostPoolName WVD-Host-Pool01 -AppGroupName “Desktop Application Group” -UserPrincipalName $UPN

}

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Refresh the RDWEB Page and see if you can access your host

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The same desktop came back since we are using FSLogix profile container

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VM fails to join Domain during Azure Windows Virtual desktop deployment

Azure Windows Virtual Desktop

WVD or Azure Virtual Desktop has become popular these days during the COVID-19 Virus where everyone started working from home. Companies wanting to adapt to the situation started deploying WVD and so I started to test this feature to keep up with the technology around.

Deployment

I tried using different scenarios during the deployment of Azure WVD, I am going to list them down and explain where did I get my problem exactly.

1- Deploying using Azure Gallery VM.

2- Deploying using a VM Image (This scenario)

3- Deploying using uploaded VM.

My first deployment was using Azure Gallery and in that deployment the machine was deployed without an issue although the domain error has occurred.

In the second Scenario, When you try to use the Github link that has the ARM template

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Error 1

{

“status”: “Failed”,

“error”: {

“code”: “ResourceDeploymentFailure”,

“message”: “The resource operation completed with terminal provisioning state ‘Failed’.”,

“details”: [

            {

“code”: “VMExtensionProvisioningError”,

“message”: “VM has reported a failure when processing extension ‘joindomain’. Error message: \”Exception(s) occured while joining Domain ‘moh10ly.local’\”\r\n\r\nMore information on troubleshooting is available at https://aka.ms/vmextensionwindowstroubleshoot

            }

        ]

    }

}

Error 2

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{“code”:”DeploymentFailed”,”message”:”At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/DeployOperations for usage details.”,”details”:[{“code”:”Conflict”,”message”:”{\r\n \”status\”: \”Failed\”,\r\n \”error\”: {\r\n \”code\”: \”ResourceDeploymentFailure\”,\r\n \”message\”: \”The resource operation completed with terminal provisioning state ‘Failed’.\”,\r\n \”details\”: [\r\n {\r\n \”code\”: \”VMExtensionProvisioningError\”,\r\n \”message\”: \”VM has reported a failure when processing extension ‘dscextension’. Error message: \\\”DSC Configuration ‘CreateHostPoolAndRegisterSessionHost’ completed with error(s). Following are the first few: PowerShell DSC resource MSFT_ScriptResource failed to execute Set-TargetResource functionality with error message: User is not authorized to query the management service.\\nActivityId: ef602cd9-7efd-474d-bc70-ccfd340ecb08\\nPowershell commands to diagnose the failure:\\nGet-RdsDiagnosticActivities -ActivityId ef602cd9-7efd-474d-bc70-ccfd340ecb08\\n PowerShell DSC resource MSFT_ScriptResource failed to execute Set-TargetResource functionality with error message: WVD-Host-Pool01 Hostpool does not exist in CagriandMoh10ly Tenant The SendConfigurationApply function did not succeed.\\\”\\r\\n\\r\\nMore information on troubleshooting is available at https://aka.ms/VMExtensionDSCWindowsTroubleshoot \”\r\n }\r\n ]\r\n }\r\n}”}]}

Solution:

Original Setting

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Change To

  1. Domain to join needs to reflect your Active Directory domain not AD Connect Public Domain.
  2. The Credentials must be for a domain user that has the privileges’ to join any PC to the domain

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The Tenant Admin UPN must reflect a user who is allowed to Create a WVD tenant

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After this, In the Tenant Admin UPN or Application ID use one of the Tenant creator account and you’ll get the below result.

Don’t forget to change the Virtual Network’s DNS to point to your DNS Server whether it is on Azure or On-premises network which must have VPN to access if there.

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https://docs.microsoft.com/en-us/azure/virtual-desktop/tenant-setup-azure-active-directory

https://docs.microsoft.com/en-us/azure/virtual-desktop/troubleshoot-set-up-issues

ADFS and wAP trust breaks with 500 Internal Server error

Error code

Yesterday my colleague sent me a message informing me that ADFS is not working. When I tried to login to Office 365 Portal page with a federated domain’s user I got a 500 Internal Server Error.

When it occurs:

If you are using Office 365 with ADFS Integration in place, You might get this error when trying to authenticate your users to login to Office 365 or any of its services.

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WAP Server

In this environment I am using WAP Proxy server behind ADFS and when installing this I configured a trust using a Public Certificate but for some reason this trust was broken.

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Investigation and Solution:

After investigating the WAP proxy it seems it had couple of problems:

1- Could not resolve ADFS server name on WAP Server.

  • In my environment where we are using Sentinel, We have isolated the primary DC in the environment and due to this the WAP server could not reach to the DNS Server. I solved this by pointing the machine to the secondary DC and add the ADFS hostname to the host file.

2- The Web Application Proxy Service would not start.

  • The errors related to the service not starting in the event viewer were all pointing to a certificate thumbprint which didn’t even exist in the WAP’s personal store.

Event Viewer Errors

There were couple of errors related to the certificate and Service issue, Event ID 224, Event ID 12025, Event ID 7023 and Event ID 224.

The one which mostly got my attention was the 224:

The federation server proxy configuration could not be updated with the latest configuration on the federation service.

Retrieval of proxy config data from federation server using trust certificate with thumbprint failed with status code unauthorized. The remote server returned an error code 401.

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Resolution:

From WAP server’s fire up PowerShell as an admin and list the certificate you have got on your Personal store and match the ThumbPrints of the certificate in the error to make sure it exists or not.

Even if the certificate exists you will still need to re-establish trust with ADFS to make sure WAP can connect to ADFS without an issue.

Dir Cert:\localmachine\my

This should show the certificates you have got on your store.

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Now pick up the valid Public certificate which you want to use for the trust and use the below command to establish the trust

Install-WebApplicationProxy –CertificateThumbprint “Enter Certificate ThumbPrint here” –FederationServiceName “ADFS Public FQDN Here”

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After few moments you should see that WAP services went back to normal and you can now login your users to Office 365 portal through ADFS.

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Reset Azure VM Admin password with Domain Controller installed

Active Directory Admin Password

We had a security lab on Azure with 12 machines, It included 2 DCs and 10 other machines of different OS and had RDP closed on all the machines except one machine to use.

The Password was set for something simple however it seems that someone has changed it and no one was able to access the domain controller anymore nor any of the machines.

I had another user created for backup but it seems that user was also changed.

The usual method of resetting Azure VM is going through portal or PowerShell

Resetting Via Azure Portal

When you try to reset the password from Azure Virtual machine itself. If the VM has Domain Controller it will fail to reset the password with the following error:

Failed to reset RDP configuration

VM has reported a failure when processing extension ‘enablevmaccess’. Error message: “VMAccess Extension does not support Domain Controller.” More information on troubleshooting is available at https://aka.ms/vmextensionwindowstroubleshoot

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Through PowerShell

To reset a password, we first need to define the VM we’re working with. To do this, we can use the Get-AzureRmVm cmdlet. I’ll go ahead and assign variables to both the VM name and the resource group since we’ll need to reference those later, as well.

$vmName = 'YOURVMNAMEHERE'
$resourceGroupName = 'YOURRGHERE'
$vm = Get-AzureRmVm -Name $vmName -ResourceGroupName $resourceGroupName

Next, we’ll need some way to pass the username and password into the script. A great way to do that is through the Get-Credential cmdlet.

$credential = Get-Credential

Once the credential is saved, we can then execute the command to actually make the password change using the variables we set earlier. Notice we had to use the GetNetworkCredential() method on the pscredential object. This method will not work if the credential is retrieved from another computer or from another user account. This shouldn’t be a problem, though, since you’re likely to execute this in a single script.

$extensionParams = @{
    'VMName' = $vmName
    'Username' = $Credential.UserName
    'Password' = $Credential.GetNetworkCredential().Password
    'ResourceGroupName' = $resourceGroupName
    'Name' = 'AdminPasswordReset'
    'Location' = $vm.Location
}

$result = Set-AzureRmVMAccessExtension @extensionParams

Once this completed (hopefully successfully), the VM will need to be rebooted. We can do that by using the Restart-AzureRmVm cmdlet.

$vm | Restart-AzureRmVM

While this PowerShell script might work with a normal VM, It will not work with a DC and would result in the same error as in the portal.

Solution

The solution is to write a script which would run through the CustomScriptExtension that you can deploy from the Azure Portal on the intended VM that has the Domain Controller Deployed on it.

Once you get the script ready to change the administrator Password you can upload the script and deploy it.

Let’s get the script ready and demonstrate these steps one by one.

– On my Computer I will write a tiny script that will say

Net User domainadmin Adm!nPassw0rd1

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– Save the file on your desktop for later use. Go to Azure Portal, Virtual Machines and select your Domain Controller.

– Go to Extensions.

– Click on Add

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– Select Custom script Extension

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– Click Create

– Browse the PowerShell script on your Desktop.

– Select Storage Account

– Select an existing container or create new one

– Upload the file to the container

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Result

Once deployed, it’ll take few mins to reset the password and you don’t have to restart the server.

Through PowerShell

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After this I was able to access the machine again using the new password in the script.

ref:

https://docs.microsoft.com/en-us/azure/virtual-machines/extensions/features-windows#troubleshoot-vm-extensions

https://docs.microsoft.com/en-us/azure/virtual-machines/windows/run-command

https://mcpmag.com/articles/2017/12/13/azure-vm-password-with-powershell.aspx

https://docs.microsoft.com/en-us/azure/virtual-machines/troubleshooting/reset-local-password-without-agent

Microsoft Exchange Vulnerability affects all Exchange versions

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CVE-2020-0688 | Microsoft Exchange Validation Key Remote Code Execution Vulnerability

Security Vulnerability

Date of Publishing: February/11/2020

Microsoft has announced a vulnerability has been found in all Exchange Server 2010 through 2019 versions, The vulnerability allows an attack to send a specially crafted request to the affected server in order to exploit it.

When could this happen?

A remote code execution vulnerability exists in Microsoft Exchange Server when the server fails to properly create unique keys at install time.

Knowledge of a the validation key allows an authenticated user with a mailbox to pass arbitrary objects to be deserialized by the web application, which runs as SYSTEM.

The security update addresses the vulnerability by correcting how Microsoft Exchange creates the keys during install.

Affected Versions:

  • Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 30
  • Microsoft Exchange Server 2013 Cumulative Update 23   
  • Microsoft Exchange Server 2016 Cumulative Update 14   
  • Microsoft Exchange Server 2016 Cumulative Update 15   
  • Microsoft Exchange Server 2019 Cumulative Update 3   
  • Microsoft Exchange Server 2019 Cumulative Update 4

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Solution:

Until now Microsoft has not provided any solution or work around to cover this vulnerability.

Mitigations

Microsoft has not identified any mitigating factors for this vulnerability.

Workarounds

Microsoft has not identified any workarounds for this vulnerability.

NOTE:

Keep an eye on the below link for any change

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0688

Microsoft Windows 10 security updates KB4532695 and KB4528760 causes TPM driver to fail and results in windows 10 BSOD

Update: For the solution scroll to the end of the page.

Windows 10 Update :

Yesterday and today Microsoft released KB4532695 and KB4528760 causes TPM 2.0 driver to stop functioning and causes BSOD with error “Memory Management” Issue.

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Windows Hello Face Authentication

In the first KB Microsoft says they have improved the accuracy of Windows Hello Face authentication however this would cause your PIN to be reset, TPM driver stop functioning and BitLocker to change in Pause state.

Check KB Article here

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The BSOD will generate an event ID 1001 stating the bugcheck code and saves a dump. ( I haven’t analyzed that yet).

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After Uninstalling the updates it was a no go but at least the Memory Management BSOD stopped..

Interesting thing is that not just TPM stopped, now even Virtual Box says no Virtualization Capabilities supported on my Device which I had over 20 VMs on it and was working fine also before these updates.

The TPM is indeed firmware as it’s fixed on the board..

In the event viewer related to Device Manager (Trusted Platform Module 2.0) I see couple of errors sourced from Kernel-PnP and UserPnp

KernelPnp error

Device ACPI\MSFT0101\1 had a problem starting.

Driver Name: tpm.inf
Class Guid: {d94ee5d8-d189-4994-83d2-f68d7d41b0e6}
Service: TPM
Lower Filters:
Upper Filters:
Problem: 0xA
Problem Status: 0xC0000001

—-

Device ACPI\MSFT0101\1 was configured.

Driver Name: tpm.inf
Class Guid: {d94ee5d8-d189-4994-83d2-f68d7d41b0e6}
Driver Date: 06/21/2006
Driver Version: 10.0.18362.267
Driver Provider: Microsoft
Driver Section: Tpm2BaseInstall
Driver Rank: 0xFF0002
Matching Device Id: *MSFT0101
Outranked Drivers: tpm.inf:ACPI\MSFT0101:00FF0001
Device Updated: true
Parent Device: ACPI_HAL\PNP0C08\0

—-

UserPnp (Informational event) happens after Kernel-Pnp fail

Driver Management concluded the process to install driver tpm.inf_amd64_aaaa339206cb706e for Device Instance ID ACPI\MSFT0101\1 with the following status: 0x0.

Solution:

After two days of struggling I managed to find the solution.

Disable Device Guard from Group Policy and PowerShell.

  • To disable from PowerShell you’ll need to download the Device Guard and Credential Guard hardware readiness tool which contains a script that would disable/enable Device Guard.
  • Use the following cmdlet .\DG_Readiness_Tool_v3.6.ps1 -Disable after extracting the the DG readiness tools from the link below

https://www.microsoft.com/en-us/download/details.aspx?id=53337

  • From Run type gpedit.msc and launch Group Policy then navigate to Computer Configuration > Administrative Templates > System > Device Guard and set “Turn On Virtualization Based Security” To Not Configured.

Once this is done, Restart your Computer and Press F3 to disable Device Gaurd twice. When restarting the Computer will restart again and you’ll see that your TPM is back to normal.

Upgrading Exchange Online PowerShell to V2 Module

Managing Exchange Online

If you have Exchange Online and your users are MFA enabled then you most likely will be using Exchange Online’ s ECP (Exchange Control Panel or Admin Center) to connect to Exchange Online PowerShell through the Hybrid Windows since this is the only supported way with MFA.

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Clicking on Configure would install the PowerShell Module of Exchange Online which looks like the below screenshot.

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New PowerShell with MFA support

If you have launched Exchange Online PowerShell today then you most likely have noticed there’s a red line stating the possibility to try the new (Preview Version) of Exchange PowerShell V2 .

Microsoft has recently released a new version of Exchange Online PowerShell Module which supports MFA and can be run directly from your computer without the need to login to Exchange Online Admin Center and download any files from there.  Check details in this link

As stated in the article, the Module is just in preview so it has some known and maybe unknown bugs as well.

How to Install it?

The installation process is pretty straightforward, Launch Windows PowerShel as an Administrator (It’s required for the installation).

Run these 4 cmdlets

Set-ExecutionPolicy RemoteSigned
Install-Module PowershellGet –Force
Update-Module PowershellGet
Install-Module -Name ExchangeOnlineManagement

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You might get a warning that the Module you’re about to install is from an Untrusted Repository, Accept it by typing Y and hit enter

Type the following cmdlet to ensure that Exchange Online Management module is installed

Import-Module ExchangeOnlineManagement; Get-Module ExchangeOnlineManagement

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Connecting to Exchange Online

To connect to Exchange Online, Run the following cmdlet along with the new parameter –EnableErrorReporting which gives the ability to record all the cmdlets that you have run along with errors generated as well.

Connect-ExchangeOnline -EnableErrorReporting -LogDirectoryPath e:\ExchOnlineLogs.txt -LogLevel All

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After connecting, I am going to try and run two commands the Old Cmdlets and New Cmdlet and see the difference between them:

Get-CASMailbox -ResultSize 10
Get-EXOCasMailbox -ResultSize 10

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The new Cmdlet has much more details, although it says that it runs faster but it took few seconds more than the old one to run (Probably first time).

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After you run those two Cmdlets, There will be two files generated in the log directory which we have pointed the parameter to save files to.

The CSV files have details about the two cmdlets and the HTTP Method they are utilizing in order to connect along the Request and response latency.

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This new version seems to be extremely useful esp in environments where such deep details are needed for troubleshooting issues.

Stay tuned for more

Reference:

https://docs.microsoft.com/en-us/powershell/exchange/exchange-online/exchange-online-powershell-v2/exchange-online-powershell-v2?view=exchange-ps

Warning for millions of Windows 10 users

The “Windows List” website, which follows the news of the famous operating system “Windows 10“, issued a warning to the users of the Operating system after it monitored a new security update for the operating system, which is “KB4528760” causing serious problems, noting that the problem “appears to be widespread now.”

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In its interpretation of the sequence of events, the site says that this update initially fails to install on the device, issuing “a number of general error messages” that do not provide any indication of the cause of the problem, then the problem escalates as the next time you restart the computer it fails to boot .

“The recent update KB4528760 for Windows 1909 (the Windows build version number) appears to cause problems with some computers and prevents them from Starting up, causing the oxcooooooe error code. The number of devices affected by this problem has increased after installing this update,” says a user on the official Microsoft Community Forum. .

Image result for windows 10 error code oxcooooooe

Some users attribute the problem to Microsoft’s Connect app, which the company has terminated. Although it is not the only scenario of the cause of the problem, the users who installed the app or had it installed and then uninstalled it, have been particularly severely affected. It is only Windows Vista that completely re-installs the Windows 10 operating system.

What increases the importance of the warning issued by “Windows Light” is precisely that Microsoft is not yet aware of this problem. Indeed, until the moment the company states on the support page of the latest update that it is “currently not aware of any problems with this update.”

This is a recurring series of slow responses in recent years, as Windows 10 users have experienced problems caused by system updates, and this is disappointing because it encourages users to continue to download the update that might harm their computers

The good thing here is that Microsoft is working on substantive modifications to improve the updates of “Windows 10”, but the bad thing is that the process of testing the modifications in its entirety is fundamentally flawed, according to the site mentioned