Keyboard& Mouse die on xp boot up

Hi, I really could use some help here. My computer has been acting up of late. when starting it up the keyboard works alright(pressing f8 brings up the bootup options and all) but as soon it reachs the logon page, the mouse dont work, the keyboard just dies. Even pressing the numberlock key doesn't get a response, and honestly I'm stumped. Any ideas?

Avagut
 
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