Audio in and fingerprint problem

Hello,
I am James,i have an hp dv6000,initially it came with window vista and everything was working fine but i later formatted my system because it was affected with virus, from their i removed window vista and installed window xp. After turning my system into window xp my microphone can no longer detect voice input(when somebody speaks i can hear hear very well but when i speak the person can't hear me),and lastly my fingerprint sensor is not working anymore, i don't know if the fingerprint sensor software is still there or not.please help me out.