Recently when I play games, i.e. solitaire or go on youtube to watch a movie suddenly a checker image covers the screen. It consists of small squares, dark and light, just like a checker board. I have to close it down and start over as it impedes the picture. Any suggestions...I have tried adjusting NVIDIA settings but did not work.

Hi I think you have wrong forum. This one is for Exchange 2013. Please search on this page to find the forum related to your OS: http://social.technet.microsoft.com/Forums/en-US/categories Steve