-UN-install all necessary Drivers at Add/Remove programs. (making sure its been removed including older drivers.)restart required
-Download Driver Graphics from Intel site supporting win7 or if you have disc driver then that al do. for download; This may need your model no# of MoBo to suit making sure its the right one and its supported.
-IF you have done that, then its shouldn’t be a problem when installing driver and getting the right resolution and no issues….
other than that scan for infections…