Keys Dont Respond While Playing Games?

All drivers for hardware are up to date and installed. To be specific on the keys that do not work they are Alphabetical and Numerical keys only, the escape key, tilde key, tab, caps lock, shift, space etc all work... The wierd thing is that the numpad will not respond ingame if num lock is on, If it is off the buttons work BUT it recognizes them as Insert, Page down, Home, Delete etc. What driver or peice of hardware could possibly cause this problem. This problem occurs in Counter Strike Source and Starcraft II, havent tried any others but the problem is identical in the two games. If however i pull up the developer console i can use the keys perfectly to type a command but once im back IN GAME they just dont respond. When i tried to change my key bindings it cycles through numbers 0-9 doesnt matter if i press X 3 times then P 7 times it will go in a sequence of 0-9.