KagedTech

How to Fix Sysprep was not able to validate your Windows installation For example, if you have already downloaded apps on a Windows 8.1 or 10  machine where you want to run the sysprep command, the  sysprepact log file  (setupact.log) which is created under  C:\Windows\System32\sysprep\Panther  folder displays the following error(s): " [0x0f0036] SYSPRP spopk.dll:: Sysprep will not run on an upgraded OS. You can only run Sysprep on a custom (clean) install version of Windows. [0x0f0082] SYSPRP ActionPlatform::LaunchModule: Failure occurred while executing 'Sysprep_Clean_Validate_Opk' from C:\Windows\System32\spopk.dll; dwRet = 0x139f SYSPRP SysprepSession::Validate: Error in validating actions from C:\Windows\System32\Sysprep\ActionFiles\Cleanup.xml; dwRet = 0x139f SYSPRP RunPlatformActions:Failed while validating SysprepSession actions; dwRet = 0x139f [0x0f0070] SYSPRP RunExternalDlls:An error occurred while running registry sysprep DLLs, halting sysprep execution.