Error: Couldn't update to Windows 8.1 preview. How to troubleshoot?

Trying to upgrade my PC, the process goes forward but in some point, it revers back to Windows 8.0.

How can I troubleshoot the problem?

Solution 1:

I found this advice :

1. Remove any third-party antivirus

2. Enable windows firewall and defender

3. Launch the Run dialog (Win + R), and enter "WSReset.exe" (reset Windows store)

4. Perform a clean Boot :

   1. Launch the Run dialog again and enter Msconfig.exe (System Configuration)
   2. Select the Services tab, check "Hide all Microsoft services" and click on the "Disable all" button. (Important: Do Not disable Microsoft services)
   3. Select the Startup tab and click on "Open Task Manager". In Task Manager under the Startup tab, disable all startup programs. Close the task manager and System Configuration.
   4. Restart PC.

5. After rebooting into Windows 8, reset the Windows store again (step 3) and run the Windows 8.1 Install from the Windows Store.

After Windows 8.1 is installed, re-enable all the services disabled in step 4b (except the two services I suspected maybe causing "Error 0xC1900101-0x4000D" : Facial Recognition and Bluetooth). In Task Manager re-enable the startup programs.

Further investigation has shown the Facial Recognition software crashes my Windows 8.1 at boot.