Need a PC wizard (Blue screen)

[Sta]

I'm amazed i got this far. I must keep this short since it will proberbly crash again soon!

Story: I updated my graphics drivers for Nvidia (7 series) PX7900 GX2 since i hadn't done it for a long time, ever since then my computor has been well and truley fucked. So it was obvious to me to sweep the driver i downloaded and go to an older driver. I downloaded Driver Sweeper and started in "Safe Mode" then wiped my Graphics driver and "updated" to an old one.
My PC is still showing the same Blue Screen, bah.

Here's the info it gives me after recovering:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.0.6000.2.0.0.768.3
Locale ID: XXXX

Additional information about the problem:
BCCode: 50
BCP1: FFFFFFE8
BCP2: 00000001
BCP3: 81C4774C
BCP4: 00000000
OS Version: 6_0_6000
Service Pack: 0_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\Mini013109-01.dmp
C:\Users\Chris\AppData\Local\Temp\WER-44553-0.sysdata.xml
C:\Users\Chris\AppData\Local\Temp\WERE6F4.tmp.vers ion.txt

Any help? Thanks :3

[Kiro]

Why didn't you just go into the Device Manager in Control Panel>System and just find your video card and click "rollback driver"? >_>