You cannot sysprep an upgraded Windows
. Even an earlier repair install changes your system status from clean to upgraded. Sysprepping Windows 8 can only be done if and when you have done a so called clean install of Windows 8, or if the Windows 8 was pre-installed by manufacturer / vendor and it has never been upgraded or repair installation has not been done.
A Windows 7 upgraded to Windows 8 cannot be sysprepped.
What does this mean:
- If you upgrade Windows 7 to Windows 8 starting the upgrade process from desktop of 7, or you select Upgrade install, your windows 8 can no longer be sysprepped. Installation must be started by booting to install media and selecting "Custom installation" (clean install)
- If you have done a clean install of Windows 8 or got a new PC with pre-installed Windows 8 but you have donne a so called repair install, your Windows 8 can no longer be sysprepped