Stuck key?

I have an older xp computer that hasn't given me a lot of problems until recently. It appears that the "5" key is stuck. Any where I click is immediately filled with number 5's. I have connected two other keyboards and it still happens. I can't even log-in because the password box is filled up with "5"s. Is something else fried?

Thanks
D
 
If this is a desktop, the keyboard processor on the motherboard may be damaged. You might try and reinstall Windows and see if the problem disappears

How old is this computer?
 
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