1) Whirring sound (like a fan) when running which
wasn't the case when things were fine and beautiful.
The sound will sometimes kick into high gear and that
is the system's signal that it is about to crash.
If a walks like a duck.... :-) It probably is a fan.
2) Sometimes the system boots and sometimes it
doesn't. If it fails, I'll get the XP version of the
blue screen of death. (The sceen isn't blue but the
text which indicates the crash address and other
diagnostic info is.)
3) If it manages to boot successfully, several system
failure errors are generated. Sometimes that's eough
to halt the system, sometimes not.
4) If I can proceed at all (which lately is not the
case) then evetually the whirring noise gets loud
enough and then BOOM.
This definitaley sounds like your CPU is overheating.
I agree with Mike. Your fan is probably bad, or possibly some wire or
something
is block it from spinning properly (either could make your fan noisey).
If i were you i would open the case up and see if anything is blocking
the fan....
If so, unblock the fan.
If nothing is blocking the fan then pull the fan off and replace it.
You may wanna
pull the fan off anyway to clear any dust bunnies that have built up
(canned
air works well).
--Ray