Same thing happened to me. I found a fix.
At the screen where the error pops up, press the Windows Key + R to open Run. Type regedit in the box. With Regedit open, navigate to HKEY_LOCAL_MACHINE\SYSTEM\Setup\Status\ChildComple tion
Where you see "setup.exe", the value should be 1. Double click it and change the value to 3, then restart your computer. It should fix it.