Hi guys im new here, I have been building pcs for a long time, This issue is bogging my mind , was looking for assistance if possible i cant seemt to figure it out.I just built a new box that was running well for the first few days then i installed q3. All of a sudden the pc would just lock. Very odd. My temps are all fine CPU 30-40 case 30-35. I ahve an MSI k7n2Delta with an AMD 2500+, Barracuda 120 SATA, 1gb Geil 3200 ddr 400 running dual channel, Radeon 9500 Pro 128. I have 5 case fans in apporoximate intake exhaust locations.. Im stumped. It now locks on almost any app.

Eggo

Welcome to the forum, eggoman  (as in let go of my eggo  

Are there any corresponding errors in your event viewer ?

No there arent any errors in event view which is puzzling me. I can seem to figure it out. Its sporadic. And btw its Leggo my Eggo

Im hoping its an issue that is possibly common so i can fix it. This Machine is fast and nice but the lock up occur in most games and apps.

I was just playing a game and actually received an error message ( i did a restore just prior and the pc rebooted in game instead of lock up) UNHANDELD EXCEPTION:ACCESS VIOLATION c00000005

Hmmm

[QUOTE=eggoman]And btw its Leggo my Eggo [/QUOTE] Ahh, yes.

you need to get the machine to stop restarting on errors so that you can get a BSOD and error message.
Go to system properties (right click MyComputer > properties) > Advanced tab > under startup and recovery click settings > under System failure make sure "Write an event to the system log" is checked AND that "Automatically restart" is UNchecked. Click "OK" and reboot.

When you get your next BSOD, write down the entire STOP message.
You can post it here for help and/or check it at this resource.
 http://aumha.org/win5/kbestop.htm

i suspect you might try troubleshooting video drivers and card first...see this ,for eg.,

http://www.opentechsupport.net/forums/archive/topic/1387.html

Hey eggoman, have you tried running the DirectX Diagnostic Tool to see if it throws up any errors