Ok, straight to the point.
I bought payday on steam for half price, and was happy. However, the main menu is absolutely fine, yet when I go into single/multi player and basically in the screen where you choose your kit, my mouse and keyboard lag. I press up down to scroll and it lags. Moving the mouse takes a second to actually work, same with keyboard.
I'm not exaggerating at all, but it is literally, I press a key/move the mouse, and it does it after a second. With a game like payday, where you are shooting, this can get extremely frustrating. I've searched on google many times for a resolution to this problem, yet I can't find one. My graphic settings are at it's complete lowest, so that shouldn't be a problem.
EDIT: Someone suggested I use Gamebooster and a Latency booster.
Game booster did not stop this, but it did speed up my game loading time .
The latency booster I haven't tried yet. It said it needs to restart for effects to take place, but I got to go anyway. I'll look at this after I'm back from school.