OK, after cleaning up my hard drive yesterday, my keyboard would not work in Vista Ultimate 64bit. I tried 2 other keyboards. Neither of which would work either. 2 were ps2 keyboards and one was USB. Now, each keyboard was identified at post and would work in the bios. Now here is the really weird part. I decided I would go ahead and do a fresh intall of Vista, as I was about due for it anyway. Just in case, I also cleared cmos just in case I somehow change something in the bios that was causing this (though I doubt it since the keyboard worked in bios). So, I reinstalled Vista, and was able to use the keyboard to put in the activation key. So, I thought I was all set. However, once Windows fully booted, none of the keyboards would work again!! WTF? How is it possible that this problem carried over to a fresh install? At this point, I became VERY frustrated. I decided to try installing Windows XP pro. The XP installed, and now all of the keyboards work perfectly in windows. This would be fine, but I've got use to Vista now, and would prefer to use it. Anyone have any idea what this might be? Could it have anything to do with installing Vista too many times, so it started to disable functions. I'd really appreciate any input guys.