The first problem i had was my monitor getting a no signal error when i turned on my computer or resumed from sleep mode, i fixed this by using VGA instead of HDMI.
More recently ive noticed some weird resolution problems when using VGA, about 1-2 inches of display is missing from various windows (see picture 1) and when playing various games (TF2/LoL) the resolutions seem to be stretched and skewed despite using the recommended resolution of 1680x1050.
Today i tried to play Dead Island and noticed the shadows were very broken so i presumed my computer couldn't handle it but after checking the minimum system requirements realized it should play it, to see if it was just Dead Island i installed GTA:SA and the shadows in that were broken too. Ive updated my GFX drivers and directX but nothing has changed.
Any help would be appreciated, thanks.