Keyboard issue

[joe_rogers_11155]

hey guys, i have a terrible problem with my laptop keyboard. about a day ago i suddenly have this problem. almost every other key stroke will not register. no matter if im online or not, or in forums or in notepad. i have to press keys two or three times to make it register the input on screen. my laptop is clean, not nasty. ran virus scan, no issues. can't find help anywhere . it tookme ten minutes to type this correctly. all my workhas come to a screechng halt, please help. what the FUCK can i do to fix this!?

DELL studio XPS 1640, 64-bit Vista