No, actually I never play around with settings unless there is a problem running the game smoothly, I am wondering what is suddenly causing this problem to happen, it used to run awesome just two days ago. I also tried Skyrim heavily modded, which runs smoothly but show glitches in the map menu, somewhat screen ghosting type effect. I also mentioned the only recent change I made to the system, ie, installed free version of avast antivirus, don't really know if that's what causing all of this to happen, but what it has to do with games.