TF2 Restarts computer on install

Like the title says, while tf2 is installing or updating, my computer will just randomly restart, but this only happens with tf2, I have updated all of my drivers, I know its not my video card as I can run the l4d2 demo on high,

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System Information
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Time of this report: 11/1/2009, 11:25:26
       Machine name: FORESAKEN
   Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.090804-1435)
           Language: English (Regional Setting: English)
System Manufacturer: To Be Filled By O.E.M.
       System Model: To Be Filled By O.E.M.
               BIOS: Default System BIOS
          Processor: Intel(R) Pentium(R) 4 CPU 3.00GHz (2 CPUs)
             Memory: 2048MB RAM
          Page File: 1041MB used, 2903MB available
        Windows Dir: C:\WINDOWS
    DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
     DxDiag Version: 5.03.2600.5512 32bit Unicode

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DxDiag Notes
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  DirectX Files Tab: No problems found.
      Display Tab 1: No problems found.
        Sound Tab 1: No problems found.
          Music Tab: No problems found.
          Input Tab: No problems found.
        Network Tab: No problems found.

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DirectX Debug Levels
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Direct3D:    0/4 (n/a)
DirectDraw:  0/4 (retail)
DirectInput: 0/5 (n/a)
DirectMusic: 0/5 (n/a)
DirectPlay:  0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow:  0/6 (retail)

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Display Devices
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        Card name: RADEON X800 PRO/GTO
     Manufacturer: ATI Technologies Inc.
        Chip type: ATI Radeon Graphics Processor AGP (0x4A49)
         DAC type: Internal DAC(400MHz)

Nobody...?

Fixed it, if anyone is wondering, it is Ad-Aware that is causing the problem, removing it fixed this.