Error codes

0x800703F1

The configuration registry database is corrupt

What it means

Windows setup tried to read a registry hive it needs and found damage, so the upgrade or update stopped.

Common causes

• A damaged registry hive
• A drive that returned bad data
• A failed earlier update

How to fix it

1. Make a restore point first: search for Create a restore point, select the system drive and press Create.
2. Run chkdsk C: /f at the next restart, then retry.
3. Open Terminal (Admin) and run sfc /scannow, then DISM /Online /Cleanup-Image /RestoreHealth. Restart afterwards.
4. If it keeps failing, do an in-place upgrade with the current ISO; it rebuilds the hives Windows needs.