Carte graphique PB !!!

Bonjour,

voila 5 jour que mon ordi fait des siennes. quand je le démarre il se lance en 800x600 et en couleur négative. or j'ai un écran (qui fonctionne je joue a la ps3 correctement deçu) en 1024x780. il démarre bien quand il veut ( normal ou mode sans echec) mais il bug quand il veut ( normal ou mode sans echec). j'ai remarquer que windows a bloqué ma CG car elle est "dangereuse". voici un test qui peut etre pourra vous servir:
merci de votre aide.
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System Information
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Time of this report: 5/11/2011, 15:55:40
Machine name: PC-DE-UTILISATE
Operating System: Windows Vista(TM) Édition Familiale Premium (6.0, Build 6002) Service Pack 2 (6002.vistasp2_gdr.101014-0432)
Language: French (Regional Setting: French)
System Manufacturer: FUJITSU SIEMENS
System Model: G31T-M2
BIOS: Default System BIOS
Processor: Intel(R) Pentium(R) Dual CPU E2140 @ 1.60GHz (2 CPUs), ~1.6GHz
Memory: 2046MB RAM
Page File: 1119MB used, 5563MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
DxDiag Version: 7.00.6002.18107 32bit Unicode

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DxDiag Notes
------------
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Sound Tab 2: No problems found.
Input Tab: No problems found.

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

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Display Devices
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Card name:
Manufacturer:
Chip type:
DAC type:
Device Key: Enum\
Display Memory: n/a
Dedicated Memory: n/a
Shared Memory: n/a
Current Mode: 1024 x 768 (32 bit) (1Hz)
Monitor:
Driver Name:
Driver Version: ()
DDI Version: unknown
BGRA Supported: No
Driver Attributes: Final Retail
Driver Date/Size: , 0 bytes
WHQL Logo'd: n/a
WHQL Date Stamp: n/a
Device Identifier: {D7B70EE0-4340-11CF-E025-7137AFC2CB35}
Vendor ID: 0x0000
Device ID: 0x0000
SubSys ID: 0x00000000
Revision ID: 0x0000
Revision ID: 0x0000
Video Accel:
Deinterlace Caps: n/a
DDraw Status: Not Available
D3D Status: Not Available
AGP Status: Not Available