You mean System Restore as restoring the computer to an earlier time, see link below) ? 

https://www.lifewire.com/how-to-use-system-restore-in-windows-2626131

Or.... 

You trying to reinstall windows 10 ? 

https://support.microsoft.com/en-us/help/4000735/windows-10-reinstall

Any update on the computer byrhtferth ? I'm assuming the computer is up and running again?