since it said it was a hardware error, i'd go with it being a hardware error. 10/10 times i've seen a blue screen in XP it was bad RAM.
i was initially under the impression that you got this back and it started doing it again, but now i see thats not the case. you have two options:
1: sit around and go insane wondering whether or not to install your programs you need to use, or
2: install them and see what happens, then if there is a problem, copy it down and come back.
if you do get a blue screen, it's not the end of the world. then you'll at least know what's causing the problem one way or the other.
MY 1337 SYST3M:
(1)case - generic
45jiga-hurts intel pentium VIIteen hollywood
some more ram.
asusapaloozatron v7542 mobo