Flickering Open/Close When Try To Run

[Keifru]

Reinstalled Steam, patched it all up. . .no dice.

I also played Killingfloor, just not recently and I don't feel like waiting the tens of hours for it to patch back up so I could see if the same glitch is occuring.
Portal as well, but I have removed that game.

I am on the internet, but I tried it in offline mode once. All it does is make it flicker even faster.

I guess I should send a support ticket to steam themselves... =_=