When updating a Windows 7/8 machine to Windows 10, it may fail with a message box that says “Windows (10 or 11) has failed” with only an OK button. Here’s how to resolve this:

1. Create an ISO with the Media Creation Tool.
2. Extract the ISO into a folder (WinRAR will do this.)
3. Right-click on Setup, Run as Administrator
4. On the Install Windows 10 page, click on “Change on how Windows Setup downloads updates” link and select “Not Right Now”
5. Proceed with the upgrade and it should complete successfully.