Solved: “The computer restarted unexpectedly” loop Windows 10

By April Cai in Common Errors Tags: Windows 10

If you’re trying installing Windows 10, and you’re seeing this error saying The computer restarted unexpectedly or encountered an unexpected error, you’re not alone. Many Windows users are reporting it. Maybe you keep getting this error after clicking OK each time.

But the good news is you can fix it easily by yourself. Here’s an easy solution you can try.

On the same error message screen do these:

1) On your keyboard, press the Shift key and F10 to invoke the Command Prompt window.

2) Type regedit and press Enter.

Click Yes when prompted by the User Account Control.

3) You should then see the Registry Editor window. Go to HKEY_LOCAL_MACHINE\SYSTEM\Setup\Status\ChildCompletion.

4) Double-click setup.exe. Make sure the Value data is set to 3, then click OK.

5) Close the Registry Editor window. 

6) Restart your computer.

  • Akenath Surujbally

    I am having the same problem nothing happens when i press the shift key and f10

  • Ah Woon Chan

    for some reason after doing the fix as described, now my laptop keeps re-booting itself all the time: boot, windows icon, a window showing upgrade in 64% and saying that it will re-boot. When it reboots the whole cycle happens again and again… what’s wrong? The upgrade shows 64% the whole time.

    • Noemi Quiles

      Mine is doing the same. What did you do to fix it? I’m getting really frustrated

      • Ah Woon Chan

        Since I didn’t get any help from here. I tried to fix it myself and got it work 🙂 I made a bootable usb with windows 10 upgrade and change the boot order to usb as first. So next time I turned on my computer it booted the usb and started the upgrade and finished it successfully!

        • Nina Nguyen

          i have the same problem, it just stay at 64%, could you tell me how to handle?