I installed newest AMD Radeon R7 260x Sapphire and it worked fine but monitor stop working so i unplug monitor cable from graphic card, shut down PC, wait a bit and start PC and monitor works but as i start it tells me that Driver for graphic card doesnt exist or doesn't work. I opened AMD Catalyst control center where used to be lots of options now there are none, something is most certainly wrong, when i run autodetect it tells me i already have the driver, when i run DDU there aren't any installed drivers there. What do i do?