errm, i would remove all evidenve of graphics drivers from your hard drive.
go to my computer, then the drive the drivers are installed in, program files, and looks for the driver folders, then delete the folder, or if there sort of installed, uninstall those graphics drivers frist,. then restart computer, then go and delete the graphics driver folders if there still in there, then try to install the drivers again.
example loaction of folder (MY COMPUTER/C:/PROGRAM FILES/NVIDIA DISPLAY DRIVERS) i aint sure on the name of the folder, i havent had nvidia drivers in a long time.
to uninstall drivers and other thigns from your computer, go to the following.
Start/control panel/add or remove programs.
you dont have intergrated graphics on your motherboard do you?
try reinstalling all your motherboard drivers aswell, do you have a cd that came with your motherboard?
dont post one post after another plz, use the edit function to edit your post :)