PC experts fast!

connect an external keyboard, so you can finish the setup.

(i assume there is something actually broken, since i doubt a virus would corrupt your windows setup...)

Have you tried turning it off & then back on? But seriously, I think your laptop is done for. R.I.P

The keyboard just randomly started working but how do I disable the touch screen?

Here are the steps:

First, go to the device the manager by opening the "Charm Menu" and search for "Device Manager." If you don't see it, change the search filter to "Settings."
Once in the Device Manager, expand "Tab." Then find "Human Interface Devices" and expand it.
You should see several "HID-compliant device" listings. Some PCs will call it an HID-Compliant Touch Screen, but yours may vary—if you don't have a touch screen option, you may have to try each HID Compliant ____ until one works. When asked if you want to disable the device, select "yes." That's it! The touch screen on your Windows 8 device should be disabled.
http://lifehacker.com/disable-your-laptop-s-touch-screen-in-windows-8-1-1588333600