The Dink Network

Here I go again, I messed up my COMPUTER now. X_x but in order to use the windows XP CD to repair it, I need to insert the 'administrater password'. I inserted my user password(Its windows XP), and it refused. I didn't make any other passwords for the computer. Is there an already created password when you buy the PC? Or is it asking for a 'Certificate of whateveritwascalled' or something?

EDIT: No, I checked and I didn't have caps lock on at the time.