yes ..a simple roll back will work if it hasn't been done. In my case I did it and later W7 reinstalled the bad driver through auto updates. Afterwards I couldn't find the factory driver. HP support directed me to use the HP recover manager which will load the original factory driver. Simple...
I had the same problem. I worked with HP support by phone and they reinstalled the original driver for the Nvidia card. Then they hid the update driver that was causing the problem so that W7 would not automatically reinstall it. I also set the auto update to get my permission before installing...