linusb has screwed me over - what now?

I was trying to get my AVRISP MKII to work by installing libusb for windows, when suddenly - no more USB ports. Any way to get them to work without losing the libusb driver? If not, any way to get rid of the driver (safemode wont let me use my mouse/keyboard either) so I can atleast use my pc again?

boot a linux live cd and pick out all the usblib files from windows and let it freak out next boot?

I was about to post an edit actually. I discovered a very nicely hidden system restore feature in the Win bootloader, and it worked. Yay.

Did the same thing a couple of weeks ago - used system restore to roll back.