Wireless Kensington Mouse & Keyboard Problem in Vista

I built a computer for a friend, installed Vista Ultimate and everything runs great.

He went and bought a Kensington wireless mouse & keyboard combo and hooked it up. That ran great too. Well he decided to install the software that came with this package and pushed through the "these drivers are not for Vista blah blah" and continuted anyway.

Well, after he restarted his computer, BOOM, no keyboard our mouse works. So he calls me, tells me what he did, and I say well, do a Vista restore to yesterday and you'll be good, don't install that software again! Well guess what, he can't use the keyboard or mouse at all.

Long story short, we tried connecting a few more mice and keyboards to the machine, none of them will work and everytime one is plugged in, Vista says (where you normall see "Updating hardware" messages in the bottom right) Driver not installed properly; and that's it. Everytime you connect any keyboard or mouse. The ports work just fine cause if I go into BIOS they keyboard works no problem.

I probably wrote all this to answer my own question, but I was wondering if anyone else had any ideas besides running the Vista CD and doing a restore from it. (I hate doing restores because of losing some system updates and settings since the last good "working condition." But if I have to I have to. Just wondering if anyone has a better idea than that.

Again please note: No keyboard or mouse will work in Vista, I've tried even in safemode, nothing will work or install. (The computer is running just fine but the input of keyboards and mice will not work).

Thanks in advanced!

Have you tried reactivating the keyboard by pressing the connect button under the keyboard and the mouse reset button?

I am facing the exact same problem in windows 7 professional. The problem is that I can not login to windows without a .KBD-Mouse and the DVD Restore would not let me pick a restore point. Any help would be greatly appreciated.