Ok, are you sure you are getting the correct drivers for the correct OS and correct bit? I see that you are running Vista 32bit, are these the drivers you choose?
GeForce Release 180
I was having issues with my drivers, the culprit turned out to be my monitor but, this is how I installed my drivers from now on and I have had no problems whatsoever.
I unistall my current driver from Device Manager, I inmediately see the screen changing to regular vga drivers, it asks me to reinstall, I do so, I boot up again and now Vista installs the std vga drivers, I use CCcleaner to get rid of any instances, I reboot again for good measure.
Once I am back at the desktop, I go to the folder where I downloaded the drivers, uncompress the file directly to the same folder I saved it to, I again go to my device manager, go to my display adapters, double click on vga card and then, double click on driver tab and click on update drivers.
Once there, I tell it to let me choose the driver, click on "Have Disk", search for the folder where I uncompressed the executable and click on the .inf file, it starts doing the whole installatation process and tells me to reboot once its done.
I am sure there are other ways to do this faster but, so far, this has work for me in Vista x64... I wouldn't think it would hurt anything trying it this way.