Shift keys randomly stop working

[PixieGirl]

Hey guys, lately my shift keys seem to switch on and off for no reason. I'm not sure what it causing this but I will just be typing and try using my shift and it wont work. It prevents me from doing all my cute smilies on msn and facebook :[

Then after a while it will just work fine again. Its been doing it for about a week now and its getting very annoying. It means I have to use the caps lock to do a capital letter, and if Im playing a game that needs the shift key it wont work (I assume... so far it has been working at the times i've played games though) and lots of other little niggling issues.

This goes for both shift keys. It seems weird that both will spontaniously stop working at the same time, and then work fine again later.

Does anyone have any ideas? I have another keyboard I'm going to try plugging in later but I feel its more likely to be the computer messing something up.
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[hotmr2]

you can try by pulling it apart at the back of it and give it a good clean . there may be something in the way it that may causing it
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[Fetidchimp]

sticky keys isn't turned on by any chance?
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kill, kill, kill.....the white man. Kill the white man, kill