Win 10 automatic repair loop after update

[Crumpet]

Friends PC is looping after the latest update to Windows 10.

We've tried "go back to a previous version" but it said that wasn't available.

We've tried a windows reinstall through the troubleshooter itself, which got him into windows briefly, and then it restarted and looped again.

PS/2 Keyboard appears inactive in troubleshoot menus.

Please help.

PC is i7 2600k, Radeon 5770 Hawk, Windows 10 Home 64bit

-edit-

He can get here, but the keyboard doesn't respond.

 

[UsandThem]

Have you tried booting from a Windows 10 boot disc/drive, and repairing it that way?

https://www.microsoft.com/en-us/software-download/windows10ISO

 

[Crumpet]

Have you tried booting from a Windows 10 boot disc/drive, and repairing it that way?

https://www.microsoft.com/en-us/software-download/windows10ISO

No not yet, so if he burns an official iso to a USB and boots from it, what does he need to do? I've only ever done that to fully reinstall windows?

 

[UsandThem]

No not yet, so if he burns an official iso to a USB and boots from it, what does he need to do? I've only ever done that to fully reinstall windows?

It will also give an option for repair since it will see the existing installation.

 

[Crumpet]

It will also give an option for repair since it will see the existing installation.

Thanks, we'll give that a go tomorrow, he's also picking up a USB keyboard to see if that works better.