Possible Duplicate:
Secondary monitor does not display native resolution
I use an on-board GPU on my computer (GForce 420 GT) with 2 screens, one is connected via DVI and the other VGA. For the past 2 years the screen resolution on those screens was 1920x1080 (which was the their native resolution). Last week I updated the Nvidia driver to 310.90 (latest) since then the Nvidia control panel decided that the native resolution on the VGA connected screen is 1793x1080, not only that but when I choose this resolution the screen goes blank, if I choose a lower resolution the screen is shown but everything is blurry, what to do?
I already tried re-installing the driver and also roll-back
I use win7 pro 32bit