fix computer errors

My laptop works completely fine until I get to random points in games. The laptop will just crash, completely turn off, with no error message. It will then automatically restart as if I have shut it down normally, with no error message displayed upon log-on, apart from something about SQL servers, which have appeared ever since I manually uninstalled MS Office 2007. On my flight Simulator (ms 2004), it will do this whenever I open a flight, and switch to an external view. On another game it will crash whenever I open the options menu. I have tried updating the drivers, but I have absolutely no idea what is wrong with it, it has never done it before. Anybody know the cause / solution of this extremely annoying big?
Here is my DxDiag report, don’t know if it helps.
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System Information
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Time of this report: 6/21/2009, 16:25:57
Machine name: TM5720
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp.080413-2111)
Language: English (Regional Setting: English)
System Manufacturer: Acer
System Model: TravelMate 5720
BIOS: Ver 1.00PARTTBL
Processor: Intel(R) Core(TM)2 Duo CPU T7100 @ 1.80GHz (2 CPUs)
Memory: 1014MB RAM
Page File: 559MB used, 1878MB 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. DirectDraw test results: All tests were successful. Direct3D 7 test results: All tests were successful. Direct3D 8 test results: All tests were successful. Direct3D 9 test results: All tests were successful.
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: Mobile Intel(R) 965 Express Chipset Family
Manufacturer: Intel Corporation
Chip type: Mobile Intel(R) 965 Express Chipset Family
DAC type: Internal
Device Key: Enum\PCI\VEN_8086&DEV_2A02&SUBSYS_011F10…
Display Memory: 384.0 MB
Current Mode: 1280 x 800 (32 bit) (60Hz)
Monitor: Plug and Play Monitor
Monitor Max Res: 1600,1200
Driver Name: igxprd32.dll
Driver Version: 6.14.0010.4837 (English)
DDI Version: 9 (or higher)
Driver Attributes: Final Retail
Driver Date/Size: 6/5/2007 23:48:40, 57344 bytes
WHQL Logo’d: Yes
WHQL Date Stamp: n/a
VDD: n/a
Mini VDD: igxpmp32.sys
Mini VDD Date: 6/5/2007 23:48:58, 5761728 bytes
Device Identifier: {D7B78E66-6942-11CF-7061-1521A2C2CB35}
Vendor ID: 0×8086
Device ID: 0×2A02
SubSys ID: 0×011F1025
Revision ID: 0×0003
Revision ID: 0×0003
Video Accel:
Deinterlace Caps: n/a
Registry: OK
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Not Available
DDraw Test Result: All tests were successful.
D3D7 Test Result: All tests were successful.
D3D8 Test Result: All tests were successful.
D3D9 Test Result: All tests were successful.
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Sound Devices
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Description: Realtek HD Audio output
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0268&SUBSYS…
Manufacturer ID: 1
Product ID: 100
Type: WDM
Driver Name: RtkHDAud.sys
Driver Version: 5.10.0000.5423 (English)
Driver Attributes: Final Retail
WHQL Logo’d: Yes
Date and Size: 5/31/2007 04:04:56, 4424192 bytes
Other Files:
Driver Provider: Realtek Semiconductor Corp.
HW Accel Level: Full
Cap Flags: 0xF5F
Min/Max Sample Rate: 8000, 192000
Static/Strm HW Mix Bufs: 33, 32
Static/Strm HW 3D Bufs: 33, 32
HW Memory: 0
Voice Management: No
EAX(tm) 2.0 Listen/Src: Yes, Yes
I3DL2(tm) Listen/Src: Yes, Yes
Sensaura(tm) ZoomFX(tm): No
Registry: OK
Sound Test Result: Not run
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Sound Capture Devices
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Description: Realtek HD Audio Input
Default Sound Capture: Yes
Default Voice Capture: Yes
Driver Name: RtkHDAud.sys
Driver Version: 5.10.0000.5423 (English)
Driver Attributes: Final Retail
Date and Size: 5/31/200