Hi Mark!
I found it when I was setting up my new GTX-460 video card at home.
Everything was lagging when you clicked on it. The scroll slides were very bad lagging way behind when I was trying to drag the slider downward, it took awhile to change web pages, use the BOOKMARKS menu, check the LOG FILEs, etc.
I tried changing the driver and that did not have any effect. I was hoping it would because I was using a windows basic desktop with a plain blue background, that I managed to tile in some pics of my grandchildren to have in the center of my screen! Grandma loves it!
After reading at the Folding Forum Bruce said to use AERO for best performance.
I changed my personalized setting back to AERO and suddenly the lag went away. Gone.
I then figured out how to get pictures back using Aero so I have those as the entire background on the desktop full screen now, changing daily. Cool!
Problem solved.
micro...