Don't be too worried about updating video card drivers.

If there is no problem then you don't need to update. If you have a problem then trying different driver versions, also older, is necessary.

For example, I can't use the newest NVIDIA drivers with my 6600 GT. I get graphical glitches in more than one game if I do.

This is the kind of s**t we need to deal with when using personal computers. It's a good advice, often ignored, that if it works then don't try to fix it. Consider yourself lucky if it works.