Mouse Lag Problems

[sparks]

I was wondering if anyone has had issues with the mouse "lagging"? It's like the mouse is very difficult to control and very very slow, it makes it extremely hard to navigate through the game, almost like the mouse is too sensitive? Not sure what the problem can be, other than that I have no graphical issues or other problems running the game. I have tried turning off the posteffects and shadowing, even increased and decreased the mouse sensitivity but nothing helps. Any suggestions would be greatly appreciated, as it is very frustrating to even play the game with this mouse issue. Thanks for any help in advance.
Sparks