OK.
It was for Windows 2000 so it might not work, but give it a try.
(A SAM file is an encryted file that contains passwords)
I tried cracking the SAM file but it didn't work. It gave the
guest password but not the
administrator.
So then I came up with this.
1 - I made a DOS 7.0 boot disk (you can do this with a free download)
2 - I made an NTFSDOS disk. This is a program that gives you write access to NTFS drives.
3 - I got the SAM file from my home computer (I knew what it contained (my passwords + usernames))
4 - I replaced the SAM file on the school computer with my one.
5 - I logged on with my password.
Its pretty weird because you never find out the administrator password. Works though.
However, one some computers it might notice the differences in the SAM files and not start up. This is why you must make sure that you keep the original SAM file to put back if it screws up.
I did it with three floppy disks but you could probably do it with two.
Have fun.
...and like that; he's gone...