won't startup

> Hello,
> I need some help and am not really sure where to go. If
> you could answer my question or just direct me somewhere
> else I would be very appreciative.
> I recently was cleaning a bunch of files off my computer.
> I deleted a lot from "My Documents". Next, I went to
> add/remove programs and removed a bunch of extraneous
> programs I never use (just random things, nothing
> important). I then defragmented my hard drive and shut
> down.
> Now when I startup it goes to a blue page (similar to the
> one that checks for errors when you shut down improperly)
> and says it is checking for drive errors. It scans
> everything, gives a detailed report and then says that
> there are no errors. It then shuts down and starts up to
> a black screen with white text that says the computer
> didn't start properly because of hard/software issues. It
> asks how I want to start up (safe mode, last known good
> config., or normally) and none of them work. It tries (a
> bunch of things print up on the screen:
> C:\....\.....\.....\drivers\hub or something like that)
> but then it just shuts down.
> What do I do? I can't get onto the desktop to just update
> XP. If I boot from the CD I have to delete the parition
> (this means I lose al files right?). What can I do? ANy
> input would be greatly appreciated.