|I am a big fan if doing a clean install from OEM media.|
I never trust trying to repair. You will have to be very cautious with all your usb and burned media as it may contain those and more malware.
To speed up the recovery process you may with to make an good image of the system after all the updates and apps are installed and save it.
When you get finished learn and use as many best practices as you can to avoid this in the future.
Playing to the angels
Les Paul (1915-2009)