| Error | Likely Cause | |--------|----------------| | Sysprep fatal error | Unsupported apps, store apps provisioned for non‑admin, or corrupted image. | | Activation failure | Non‑genuine key or unsupported edition. | | Boot loop after OOBE | Missing critical drivers (storage/network). |
Disable consumer features, pre-installed games, and taskbar widgets.
Run Windows in Audit Mode to make changes without triggering the OOBE.
Check the log file at C:\Windows\System32\Sysprep\Panther\setupact.log to identify the exact package causing the failure. Registry Clean Up