i am a couple versions behind with the gtx drivers so I hope this fixes it and it's only not working because windows maybe got an update and went "LOL NOPE WHAT'S A SECOND MONITOR AGAIN HAHAHA" and the drivers went "yo I'm right here" but Windows forgot how to talk to that particular bit of the drivers for some reason because it uses an older standard?? I dunno. Sometimes I think windows is like a pokemon, it only knows four moves at a time and forgets some to make way for new ones.