My desktop test system for Windows 7 Ultimate is a HP s5150t with a NVIDIA GeForce GT 220 video graphics driver. As I post this tip, the NVIDIA site has the following video driver available (since 8/21/2009):
Which I installed a couple of weeks ago. Previously they had the following:
I was having periodic problems with the v186.34 version where the video would just stop sending a signal, and I'd have to remote in and restart the computer. Since putting on v190.62 I haven't had this issue so I think the bug has been fixed.
However, I recently ran Windows Update (I think on Friday morning) and it said there was a new graphics driver available for the NVIDIA GT220. I mistakenly trusted the recommendation and installed it. It appears to have been the v186.34 version because my video issue shortly re-appeared. I backed out the buggy update, put v190.62 back on, and everything is stable again.
Hopefully, as Window 7 gets closer to official launch, this type of driver issue will be resolved. If not, it could be a rocky launch for what has been for me a pretty solid product.