Use a software called KonBoot.
No need to download all those 500 MB CD rips just to bypass a password.
This is only a 3 MB file, that can enter widows with bypassing the password.
Though i dont think it can change it or remove it.
But you can do that after you enter windows using it, i have tried it, and it works just fine.
It can be used on a CD, USB and a floppy drive.
Here is a torrent download of the software.