Carte graphique ATI/AMD fantome

Bonjour,
voila je vous explique j'ai depuis quelques temps un problème avec ma carte graphique qui ne se met pas a jour.
j'ai donc désinstallé l'ancien driver pour réinstaller le nouveau !

le problème c'est que :
-je suis passé de (extrait dxdiag avant) :
---------------
Card name: ATI Mobility Radeon HD 3470
Manufacturer: ATI Technologies Inc.
Chip type: ATI Radeon Graphics Processor (0x95C4)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_95C4&SUBSYS_19E21043&REV_00
Display Memory: 1019 MB
Dedicated Memory: 253 MB
Shared Memory: 766 MB
Current Mode: 1280 x 800 (32 bit) (60Hz)
Monitor: Moniteur Plug-and-Play générique
Driver Name: atiumdag.dll,atiumdva.dat,atitmmxx.dll
Driver Version: 7.14.0010.0555 (English)
DDI Version: 10
BGRA Supported: Yes
Driver Attributes: Final Retail
Driver Date/Size: 12/20/2007 14:48:29, 3031040 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71EE2-D684-11CF-D871-E839A1C2CA35}
Vendor ID: 0x1002
Device ID: 0x95C4
SubSys ID: 0x19E21043
Revision ID: 0x0000
Revision ID: 0x0000
Video Accel: ModeMPEG2_A ModeMPEG2_C
Deinterlace Caps: {335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
{5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY
{335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(UYVY,UYVY) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
{5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(UYVY,UYVY) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY
{335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
{5A54A0C9-C7EC-4BD9-8EDE-F3C75DC4393B}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Enabled


-a ça (dxdiag appres) :
Card name: Carte graphique VGA standard
Manufacturer: (Types d'écrans standard)
Chip type: ATI Radeon Graphics Processor (0x95C4)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_95C4&SUBSYS_19E21043&REV_00
Display Memory: 256 MB
Dedicated Memory: n/a
Shared Memory: n/a
Current Mode: 1024 x 768 (32 bit) (1Hz)
Monitor:
Driver Name: vga.dll,framebuf.dll,vga256.dll,vga64k.dll
Driver Version: 6.00.6001.18000 (French)
DDI Version: unknown
BGRA Supported: No
Driver Attributes: Final Retail
Driver Date/Size: 1/19/2008 06:52:08, 10752 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71EE2-D684-11CF-A335-932EAFC2CB35}
Vendor ID: 0x1002
Device ID: 0x95C4
SubSys ID: 0x19E21043
Revision ID: 0x0000
Revision ID: 0x0000
Video Accel:
Deinterlace Caps: n/a
DDraw Status: Not Available
D3D Status: Not Available
AGP Status: Not Available

quelqu'un saurait il me dire ce que j'ai fait et si il y a un moyen de "réparer" mon erreur ?