leave the refresh frequency at 60hz with the new drivers & enable full screen mode & see what happens. Maybe give you registry a clean using a registry cleaner or cc cleaner. As sometimes issues arise cause of over written driver updates screwing the registry. Every update of new thing i add to my build i run a registry cleaner as can be enough to throw out game settings & scaling had it before or do a validation of game files as could be a courupt file in the game file throwing out the driver or maybe a bug in the system still with the new driver. Tho there is a hot fix to the latest adrenaline driver which may fix the issue now try the newest driver & hotfix & post the results.