Hi,
after an Upgrade from Windows 10 to Windows 11 on a customer PC sysprep is no longer working. Unfortunataly the error messages in C:\Windows\System32\sysprep\Panther\setuperr.log does not really help to find the root cause:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | Error pGetUninstallInterfaceCommon: Failed loading the setupplatform, hr = 0x80070666Error SYSPRP RemoveUninstall:Failed to instantiate uninstall interface; hr = 0x80070666Error SYSPRP Sysprep_Clean_Opk:Failed to remove Uninstall; dwRet = 0x666Error SYSPRP ActionPlatform::LaunchModule: Failure occurred while executing 'Sysprep_Clean_Opk' from C:\Windows\System32\spopk.dll; dwRet = 0x666Error SYSPRP SysprepSession::ExecuteAction: Failed during sysprepModule operation; dwRet = 0x666Error SYSPRP SysprepSession::ExecuteInternal: Error in executing action for Microsoft-Windows-Sysprep-SpOpk; dwRet = 0x666Error SYSPRP SysprepSession::Execute: Error in executing actions from C:\Windows\System32\Sysprep\ActionFiles\Cleanup.xml; dwRet = 0x666Error SYSPRP RunPlatformActions:Failed while executing Sysprep session actions; dwRet = 0x666Error [0x0f0070] SYSPRP RunDlls:An error occurred while running registry sysprep DLLs, halting sysprep execution. dwRet = 0x666Error [0x0f00a8] SYSPRP WinMain:Hit failure while processing sysprep cleanup providers; hr = 0x80070666Error [0x0f0060] SYSPRP ParseCommands:Found unsupported command line option '/?'Error [0x0f00a4] SYSPRP WinMain: Unable to parse command-line arguments to sysprep; GLE = 0x0Error [0x0f0060] SYSPRP ParseCommands:Found unsupported command line option '/?'Error [0x0f00a4] SYSPRP WinMain: Unable to parse command-line arguments to sysprep; GLE = 0x0 |
After some investigation I found out that there are still parts from the old Windows version:
1 2 3 4 5 | D:\> dir C:\02.06.2025 16:05 <DIR> Windows02.06.2025 16:05 <DIR> Windows.old 3 Datei(en), 8.308 Bytes 10 Verzeichnis(se), 57.714.802.688 Bytes frei |
After cleaning up => start cleanmgr.exe with administrator permissions
sysprep runs as expected 
Michael