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09-05-2009 12:01 PM
09-10-2009 12:28 PM
This is likely a keyboard driver/software issue. Sometimes things like Windows Updates can knock out the driver and you just need to reinstall it. What PC model do you have and are you using Vista or XP?
We can link you to the keyboard driver if we know which one you need.
If you are in Vista, this HP Support document on troubleshooting keyboard issues should help you fix it.
Let us know how it goes.