Yeah, could be a memory problem. That's kind of funky though, don't know what the deal is.
As far as a backup. What type of backup device have you got? A CD burner?
XP should have a backup tool under Start > All Programs > Accesories > System Tools. It'll take quite a few CDs though.
After you do that, for the sake of argument...
Why don't you try removing ALL memory you have in there, and ONLY use the new stick you got from crucial.
See if you have any problems with just that stick.
I'm curious if it's an actual bad stick, or maybe it had bad contact, or maybe that slot is bad.
Nick
