Computer Freezing/Rebooting for no reason

[goldmario]

Already did virus/adware checks, came up with nothing.

So here's the problem. My computer randomly reboots/freezes for no reason, usually when I try playing any sort of game.

Here are my system specs (DX Diag):
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System Information
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Time of this report: 9/8/2006, 18:43:31
       Machine name: JOSHUA-SDKU6BTO
   Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_gdr.050301-1519)
           Language: English (Regional Setting: English)
System Manufacturer: ECS
       System Model: M848A
               BIOS: Default System BIOS
          Processor: AMD Athlon(tm) XP 3200+,  MMX,  3DNow, ~2.2GHz
             Memory: 512MB RAM
          Page File: 342MB used, 905MB available
        Windows Dir: C:\WINDOWS
    DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
     DxDiag Version: 5.03.2600.2180 32bit Unicode

---------------
Display Devices
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        Card name: NVIDIA GeForce FX 5200
     Manufacturer: NVIDIA
        Chip type: GeForce FX 5200
         DAC type: Integrated RAMDAC
       Device Key: Enum\PCI\VEN_10DE&DEV_0322&SUBSYS_00000000&REV_A1
   Display Memory: 128.0 MB
     Current Mode: 1024 x 768 (32 bit) (60Hz)
          Monitor: Plug and Play Monitor
  Monitor Max Res: 1600,1200
      Driver Name: nv4_disp.dll
   Driver Version: 6.14.0010.6722 (English)
      DDI Version: 9 (or higher)

-------------
Sound Devices
-------------
            Description: Creative SB Audigy LS
 Default Sound Playback: Yes
 Default Voice Playback: Yes
            Hardware ID: PCI\VEN_1102&DEV_0007&SUBSYS_10021102&REV_00
        Manufacturer ID: 1
             Product ID: 100
                   Type: WDM
            Driver Name: P17.sys
         Driver Version: 5.12.0001.0024 (English)
      Driver Attributes: Final Retail
            WHQL Logo'd: Yes
          Date and Size: 8/4/2003 22:22:32, 651264 bytes
            Other Files:
        Driver Provider: Creative Technology Ltd.
         HW Accel Level: Full



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What are possible causes of this? I have already checked my memory.

[Fed]

Update windows.
Update all drivers from the manufacturer's website.
Check the game websites for fixes and patches.
How did you test your memory?
Check your 'Event Viewer' for problems.

[goldmario]

Update windows.
Update all drivers from the manufacturer's website.
Check the game websites for fixes and patches.
How did you test your memory?
Check your 'Event Viewer' for problems.

Windows is fully updated. Latest NVidia drivers crash more for me, so I was recommended a downgrade. The games do not have patches and seem to work fine with most other systems. I used Memcheck86 to check my memory. No errors found when I ran the longer tests. I checked my event viewer. Nothing that bad...

[Fed]

Turn off 'Automatic Reboot on System Failure'.

[goldmario]

Turn off 'Automatic Reboot on System Failure'.

it's always off...turned that off a long time ago, but i still have rebooting problems...it never rebooted before...it used to just freeze
but now it freezes and reboots quickly

[Fed]

Check your cpu temperature.
http://www.comcen.com.au/~fed/everest.zip

[GX1_Man]

You say it reboots for no reason, but there always is a reason. Have a read and see what applies:

http://www.computerhope.com/cgi-bin/yabb/YaBB.cgi?num=1144733358