I have a very big problem. My computer keeps randomly freezing. my specs are:

XP Home SP3 OS
AMD Athlon 64 3200+( running at 2.3 was at 2.5)
RS482-M754 motherboard
1 Gb of DDR 184-pin 2700
PCI-E ATI Radeon X800 256 VRAM
x2 80Gb HDD IDE

ok i have had this PC for a year now until about 3 weeks ago when i was playing World Of Warcraft. Then all the sudden my PC froze! this has been continuing for about a week now. It crashes when i play 3D games. I have updated my CPU and Video Drivers. I have a extra cooling fan installed and i re-applyed Thermal paste to the processor 2 months ago. I know the CPU is not overheating because the temperatures on the system are 48 degrees Celsius all the time(118.4 Fahrenheit) or lower. My First HDD has 50% free space and my second HDD has 65% free space. I have Defragged them both, scanned for viruses and disk cleaned and no change. I am using spybot search and destroy ,AVG free and Zone alarm. All of them are up to date. Please help me to fix this problem T_T

It could be one of many things. First thing I'd do is to check the video card and clean out the heatsink of dust that may have built up. This would cause it to overheat. Use memtest86+ to test your ram. Use Prime95 to test the cpu. Use ATITool to scan for artifacts to test the video card. If you still have problems, try running with everything set at stock settings. What psu are you using? It's possible it's going bad.

Did it happen soon after SP3 update?

ok the Temps are here http://s460.photobucket.com/albums [...] erinfo.jpg

i found artifacts on my card but have no idea of what to do about it. My processor is the only thing overclocked. i cant seem to use memtest86+ or Prime95. like i said i have had this PC for about a year now and no problems. Ive had this video card for about month now and up until a week ago i never had this problem. Yes this did occur a short time after updating to SP3. my power supply is a austin power supply modelR-B300ATX. It says here http://ati.amd.com/products/radeon [...] index.html that they recommend a 300w and that's what i have. I checked my computer and its piratically cold and all the fans are working. I used hijackthis and i got this logfile i hope you can tell me what this means.

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 10:37:11 PM, on 9/21/2008
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\System32\wltrysvc.exe
C:\WINDOWS\System32\bcmwltry.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Common Files\Autodesk Shared\Service\AdskScSrv.exe
C:\PROGRA~1\AVG\AVG8\avgwdsvc.exe
C:\Program Files\Autodesk\3ds Max 9\mentalray\satellite\raysat_3dsmax9_32server.exe
C:\WINDOWS\system32\svchost.exe
C:\PROGRA~1\AVG\AVG8\avgrsx.exe
C:\PROGRA~1\AVG\AVG8\avgemc.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\SOUNDMAN.EXE
C:\WINDOWS\PixArt\PAC207\Monitor.exe
C:\Program Files\Microsoft Xbox 360 Accessories\XboxStat.exe
C:\Program Files\Java\jre1.6.0_07\bin\jusched.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
C:\Program Files\Belkin\F5D7001v2000\Belkinwcui.exe
C:\Program Files\Belkin\F5D7001v2000\ChkDev.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\ccc.exe
C:\Program Files\Internet Download Manager\IEMonitor.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://google.com/
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: IDM Helper - {0055C089-8582-441B-A0BF-17B458C2A3A8} - C:\Program Files\Internet Download Manager\IDMIECC.dll
O2 - BHO: &Yahoo! Toolbar Helper - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\PROGRA~1\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Program Files\AVG\AVG8\avgssie.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Yahoo! IE Services Button - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_07\bin\ssv.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\Yahoo!\Companion\Installs\cpn\yt.dll
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [PAC207_Monitor] C:\WINDOWS\PixArt\PAC207\Monitor.exe
O4 - HKLM\..\Run: [Monitor] C:\WINDOWS\PixArt\PAC207\Monitor.exe
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [XboxStat] "c:\Program Files\Microsoft Xbox 360 Accessories\XboxStat.exe" silentrun
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_07\bin\jusched.exe"
O4 - HKLM\..\Run: [StartCCC] "C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe" MSRun
O4 - HKCU\..\Run: [IDMan] C:\Program Files\Internet Download Manager\IDMan.exe /onboot
O4 - Startup: Xfire.lnk = C:\Program Files\Xfire\xfire.exe
O4 - Global Startup: Belkin Wireless Utility.lnk = ?
O4 - Global Startup: ZoneAlarm Pro.lnk = C:\Program Files\Zone Labs\ZoneAlarm\zapro.exe
O8 - Extra context menu item: Download all links with IDM - C:\Program Files\Internet Download Manager\IEGetAll.htm
O8 - Extra context menu item: Download FLV video content with IDM - C:\Program Files\Internet Download Manager\IEGetVL.htm
O8 - Extra context menu item: Download with IDM - C:\Program Files\Internet Download Manager\IEExt.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_07\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_07\bin\ssv.dll
O9 - Extra button: Yahoo! Services - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (Installation Support) - C:\Program Files\Yahoo!\Common\Yinsthelper.dll
O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - C:\Program Files\AVG\AVG8\avgpp.dll
O20 - AppInit_DLLs: avgrsstx.dll
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: Autodesk Licensing Service - Autodesk - C:\Program Files\Common Files\Autodesk Shared\Service\AdskScSrv.exe
O23 - Service: AVG Free8 E-mail Scanner (avg8emc) - AVG Technologies CZ, s.r.o. - C:\PROGRA~1\AVG\AVG8\avgemc.exe
O23 - Service: AVG Free8 WatchDog (avg8wd) - AVG Technologies CZ, s.r.o. - C:\PROGRA~1\AVG\AVG8\avgwdsvc.exe
O23 - Service: getPlus(R) Helper - NOS Microsystems Ltd. - C:\Program Files\NOS\bin\getPlus_HelperSvc.exe
O23 - Service: mental ray 3.5 Satellite (32-bit) (mi-raysat_3dsmax9_32) - Unknown owner - C:\Program Files\Autodesk\3ds Max 9\mentalray\satellite\raysat_3dsmax9_32server.exe
O23 - Service: TrueVector Basic Logging Client (minilog) - Zone Labs Inc. - C:\WINDOWS\system32\ZoneLabs\minilog.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs Inc. - C:\WINDOWS\system32\ZoneLabs\vsmon.exe
O23 - Service: Broadcom Wireless LAN Tray Service (wltrysvc) - Unknown owner - C:\WINDOWS\System32\wltrysvc.exe

--
End of file - 6600 bytes

well i used hijackthis then cleaned out my registry and now its seems to run good but i will have to play on 3D games for a while to see if the problem is actually fixed but i played WOW for about 3 hrs and secondlife for 1hr and no freezing at all!!! But like i said before ill have to monitor to see if the problem persists.

For consistant test, try 3dMark06 and let Speedfan monitor GPU temp, it may overheat under load. What temp does your CPU reach on full load? Have you tried reducing the overclock?

Mike