If so, get into the device manager and roll back the video drivers.
I just finished building my new pc today and had eerything working great. Currently I'm using a 19" LED tv, 720p and a Radeon HD7950. The display was in HD the whole time I installed programs and got my settings worked. The computer has windows 7 ultimate installed and needed a few updates (159 actually). I shut off and installed the updates. Upon starting it up again, the display was no longer in HD. It looks like an old VGA monitor with color problems. I checked the resolution settings, and they're still good. I tried playing with the HDMI cable, no doing. Tried playing around with other graphics settings and nothing worked there. Any ideas or assistance? Thanks a lot.