Neue grafikkarte verursacht bluescreen

Hallo.

ich habe eine neue grafikkarte eingebaut, eine gtx 275. wenn ich treiber von der nvidia seite installiere, kommt bei den neuesten treibern beim reboot der bluescreen "memory management". bei den älteren treibern bricht der pc schon während der treiberinstallation ab und geht in einen bluescreen über mit dem namen "pfn-list-corrupt". mit meiner alten grafikkarte funktioniert alles optimal.
ich habe dann versucht über den gerätemanager den treiber manuell zu installieren, sprich ich habe den treibersownload quasi entpackt, und habe im gerätemanager unter "treiber aktualisieren" den pfad angegeben. er installiert dann auch, sagt mir am ende aber, dass ein fehleraufgetreten ist. dabei steht dann "zugriff verweigert".
kann mir wer weiterhelfen?

mein system:
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System Information
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Time of this report: 1/14/2010, 15:17:53
Machine name: AODHA-WGHHLPXC7
Operating System: Windows XP Home Edition (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.090804-1435)
Language: German (Regional Setting: German)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 6400+, MMX, 3DNow (2 CPUs), ~3.2GHz
Memory: 3582MB RAM
Page File: 1405MB used, 4059MB 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: NVIDIA GeForce 8800 GTX
Manufacturer: NVIDIA
Chip type: GeForce 8800 GTX
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0191&SUBSYS_82331043&REV_A2
Display Memory: 768.0 MB
Current Mode: 1280 x 1024 (32 bit) (60Hz)
Monitor: Dell M990
Monitor Max Res: 1600,1200
Driver Name: nv4_disp.dll
Driver Version: 6.14.0011.6371 (English)
DDI Version: 9 (or higher)
Driver Attributes: Final Retail
Driver Date/Size: 9/16/2007 18:07:00, 5783040 bytes
WHQL Logo'd: Yes
WHQL Date Stamp: n/a
VDD: Nicht zutreffend
Mini VDD: nv4_mini.sys
Mini VDD Date: 9/16/2007 18:07:00, 6853088 bytes
Device Identifier: {D7B71E3E-42D1-11CF-106B-38A203C2CB35}
Vendor ID: 0x10DE
Device ID: 0x0191
SubSys ID: 0x82331043
Revision ID: 0x00A2
Revision ID: 0x00A2
Video Accel: ModeMPEG2_A ModeMPEG2_B ModeMPEG2_C ModeMPEG2_D ModeWMV9_B ModeWMV9_A
Deinterlace Caps: {6CB69578-7617-4637-91E5-1C02DB810285}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive
{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
{6CB69578-7617-4637-91E5-1C02DB810285}: Format(In/Out)=(UYVY,YUY2) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive
{335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(UYVY,YUY2) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
{6CB69578-7617-4637-91E5-1C02DB810285}: Format(In/Out)=(YV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive
{335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(YV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
{6CB69578-7617-4637-91E5-1C02DB810285}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive
{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
Registry: OK
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Enabled
DDraw Test Result: Not run
D3D7 Test Result: Not run
D3D8 Test Result: Not run
D3D9 Test Result: Not run

-------------
Sound Devices
-------------
Description: SoundMAX HD Audio
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: HDAUDIO\FUNC_01&VEN_11D4&DEV_198B&SUBSYS_104381F6&REV_1004
Manufacturer ID: 65535
Product ID: 65535
Type: WDM
Driver Name: ADIHdAud.sys
Driver Version: 5.10.0001.6110 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 1/16/2007 02:09:06, 293888 bytes
Other Files:
Driver Provider: AnalogDevices
HW Accel Level: Full
Cap Flags: 0xF5F
Min/Max Sample Rate: 100, 192000
Static/Strm HW Mix Bufs: 33, 27
Static/Strm HW 3D Bufs: 33, 27
HW Memory: 0
Voice Management: Yes
EAX(tm) 2.0 Listen/Src: Yes, Yes
I3DL2(tm) Listen/Src: Yes, Yes
Sensaura(tm) ZoomFX(tm): Yes
Registry: OK
Sound Test Result: Not run

da ist zwar noch die alte Grafikkarte drauf, aber macht ja nichts oder?