Hi,
1,What version of MECM and Windows ADK you are using? To support Windows 10 21H2 as client, we must use MECM version 2107 or later. Please refer to below guide:
New Upgrade to Windows 10 21H2 using SCCM | ConfigMgr
2.Check C:\$Windows.~BT\Sources\panther\setupact.log to see if there is any further information.
3,Please help try to remove any anti-virus or any other incompatible software, then try upgrading again. The first easy troubleshooting step we can do at this point is to launch setup.exe from the hidden C:\$WINDOWS.~BT directory. After going through the first screens, the setup will warn us about those incompatible apps. If we don't want to run the setup.exe, we can refer to the hidden C:\$WINDOWS.~BT\Sources\Panther\CompatData[date-time].xml. We’ll have a couple of Compatdata.xml files, usually, the most recent one will contain the information you need. Please check if there is a faulty application and give setup the instruction to stop.
4.Follow below steps to delete cached files, then try upgrading again:
a. Empty the SCCM Cache
b. Delete the content of C:\WINDOWS\SoftwareDistribution\Download folder
c. Delete the C:\$WINDOWS.~BT folder (hidden)
d. Initiate a Software Update Deployment Evaluation Cycle and Software Update Scan Cycle
e. Wait a couple of minute for the scan to complete and retry the deployment
Thanks for your time.
Best regards,
Simon
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