Maybe you could try reseating your video card and ram first and see if that works? Otherwise I would back up any data you need to keep, set all your hardware to default speeds like previously mentioned and do a full format and re-install of XP. From there just fully update windows, load your drivers and a few games. Don't tweak or customize anything yet! lol Just sit back with a beer and relax by playing some CS and Halo. If things act up again check out your error logs to see if you can find anything suspicious and do some googling. If nothing turns up there then I guess it's time to start swapping out some hardware.
__________________ ** Phenom 9950 X4 Black Edition @ 3.2GHz | AC Freezer 64 Pro | Gigabyte MA790X-DS4 (R.I.P.) | 4x1GB G.Skill DDR2-800 4-4-4-12 | 2 x HIS HD4870 512Mb 840core/900mem in Crossfire | Creative X-Fi Xtreme Music | WD 150GB Raptor | Silverstone Decathlon 750W PSU | Logitech Z2300 Speakers | Acer X223W | CM Stacker **
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