I just bought a used computer that is in good condition, but it shipped with windows vista. The seller appears to have upgraded to windows 7, and has eliminate the restore partition. I cane use f8 to get to where i can restore the original setting, but there is a administor password that i need to advance any further which i don't know. I bought this computer through a associate, and i do not know the seller personally. His name is still in the computer along with the password, Is there anything i can do?