I have upgraded to windows 7 from xp pro. I am using the same video card ... ATI HD 3600 series. With xp and this card I had no problems watching movies using VLC player on my big screen, ( having cloned my desktop) After a fresh install of win 7 and checking to see if this video card was compatible with Microsoft upgrade site it stated yes.Everything on my desktop work perfectly, however, when i switch over to the big screen around the outside i get vertical lines appearing. When I turn on vlc player the movie plays, again i am giving those red vertical lines apperaring around the outside of the picture, plus some pixel scramble within the movie . Now this is telling me I may have a wrong driver installed, so I upgraded the driver through the ATI site and installed it. I still have the same problem. So now what I am asking is.... do you think this video card needs to be upgraded, I have looked at the ATI HD 4750 series, however I don't know if this will correct my problem or which card i should buy. Does anyone have a solution or idea what i need to do??? I welcome all comments and thank you in advance.