Windows 10 since 21H1 | Failed access to samba guest shares

You can’t connect to a samba server configured with map to guest = Bad User Don’t try this at home: Re-Enable the guest account fallback Your risky solution: Tune your GPO. Computer Configuration\Administrative Templates\Network\LanMan Workstation\Enable Insecure Guest Logons ATTENTION:I’ve had faced situation when this didn’t do the trick. I hat to tune the registy: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters] […]

WSUS | Hint for cloned machines.

Do sysprep.exe, but you will lose activation, licenses, maybe devices. The poor mans way: Remove the SusClientID and (if exists) AccountDomainID from Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate

WSUS CLEANUP via Powershell

$WSUS = Get-WsusServer -Name SERVERNAME -PortNumber 8530Invoke-WsusServerCleanup -UpdateServer $WSUS -CleanupObsoleteComputers -VerboseInvoke-WsusServerCleanup -UpdateServer $WSUS -CleanupObsoleteUpdates -VerboseInvoke-WsusServerCleanup -UpdateServer $WSUS -CleanupUnneededContentFiles -VerboseInvoke-WsusServerCleanup -UpdateServer $WSUS -DeclineExpiredUpdates -VerboseInvoke-WsusServerCleanup -UpdateServer $WSUS -DeclineSupersededUpdates -Verbose

GPO | Create a scheduled task

Create the task on a computer. Set the executional principal to ‘NT AUTHORITY\SYSTEM’. Type the string directly or search for ‘SYSTEM’ in the computers local branch. Test it locally. Export the Task as xml. Copy the xml to an accessable network share. Create a powershell script to install the task out of this xml. Example […]

WSUS | Client error 0x80070643

Maybe a problem with Microsoft Defender signature update. Goto WSUS console and check the what patches were approved last week. If you’re lucky, the corpus delicti shows an error. Otherwise check the patch statistics of a client machine, check machines report in WSUS. Revoke the problematic one. It it doesn’t help, try this: %PROGRAMFILES%\Windows Defender\MPCMDRUN.exe” […]