I'm not very techno-savvy, but i know enough to get by. Not enough in this case though :P
I start up the tower and it dose it's Memory test whereas I can hit F1 to get to set up.
(There is no issue of freezing in the [BIOS?] Set up.)
After that the screen changes to the Windows XP loading screen.
(The earliest freeze happens right when this screen comes up.)
If I've had to restart the computer [holding power button down as ctr+alt+del don't respond] and I can access the start up options [I.e.. Safe Mode, S.M. w/ networking, S.M. w/ comandprompt, ect..] I can get into any of these modes but will be stopped shortly after about a minuet or two.
I've already Air canned the power unit, fans, motherboard, ect.. Reading over another post here, http://www.daniweb.com/forums/thread22251.html I checked the capacitors and two of them [side-by-side] had a brown, ruddy build up on the tops of them.
Two other ones look like there about to do the same, with a small dot of the stuff at the center bulging slightly outward from the capacitor's top.
Not assuming that is the problem, what else could be causing this maelstrom of unexpected freezing's?