I was tinkering in bios, I changed one thing, wich was my motherboard clock from 166 to 199 (Don't ask why, I'm stupid) ..Well, I save and now my windows XP won't start (Nothing will) ..PC turns on, but black screen. My monitor has also been acting up, so maybe it just died by some freak chance at that moment :P Well, The monitor flashes like it isn't plugged in, but it is.. Wondering if changing the CPU clock could do this?

Well, try changing it back.

I suspect you changed more than that. The chance of it dying of natural causes at the same time as you were monkeying with it seem very remote. You can avoid many of these Windows problems with Linux. Linspire eases the transition for new users

Reset the bios by either using the reset jumper if present , or remove the cmos battery for a minute. I used to have a signature but it disappeared and I just couldn't be bothered writing another so please feel free to ingore this.