Forgot my administrator password for win

1. ERD commander by Winternals.com - great tool that is an enchanced version of Recovery Console. May be written on bootable CD and provides you with a lot of abilities. One of them is changing password for any local user. Price is something about $150. You may also find cracked version in Internet, but you know it's not good to do so.
2. Locksmith by Winternals.com (these guys know what they do) - tool for changing admin password exclusevly, also not free.
3. L0phtcrack. The current version is LC3 and you can get it from http://www.atstake.com. L0pht developed the best NT password carcking utility to date. It is a GUI driven program that is pretty strait forward. The unregistered version is limited to 30 days and can only perform the most basic of cracking techniques (dictionary attack) until is is registered. If you know where to look, you can find a crack to register it for you.
4. This one is a boot disk which boots a linux sheel to modify registry settings. If you have never used Linux before, don't worry because all you have to do is select the defaults for everything all the way up to changing the password. It allows you to change any local user account password, and you don't need to know it. The instructions for making the boot disk and running the utility can be found at http://home.eunet.no/~pnordahl/ntpasswd/bootdisk.html. This utility is completely free, no gimmicks, no limitations.

Any of these will help - choose the one you like most.
Good luck,
Vagab0nd

If their is enough disk space,install the server software in a different directory on the drive and then delete the partition with the forgotten password

One other option to mention is NT access
see:www.mirider.com/ntaccess.html
www.compusmart.ab.ca/theclub/terrywas/winnt/winntpwd.htm

I've used this a few times and it works great:
http://www.jsiinc.com/SUBD/tip1900/rh1984.htm

Bob

Try either of the following:
1. Create a new partition, and install a dual bootable copy of WIN2K server. Browse to the old partition, and rename logon.scr (it's located in the WINNT\System32 folder) to logon.old copy cmd.exe (also located at the above location) to logon.scr. Boot to the old partition, wait 10-20 minutes, don't move the mouse and/or keyboard. Wait until the cmd prompt comes up, type usrmgr and reset the password, or you can use the NET USER command.
2. Boot to a floppy that can access the WINNT partition (if it's fat a windows98 boot disk is good enough, if it's NTFS, you will need a Linux boot disk that has the drivers for your harddrive, and can access NTFS partitions (most of them can access NTFS partitions, you can download Linux boot disks on a zilion places on the Internet).
Rename logon.scr to logon.old copy cmd.exe to logon.scr.
Reboot to the WINNT partition and wait, don't move the mouse and/or keyboard. When the command prompt comes up type usgmgr or usethe NET USER command to reset the admins password.
The reason that this works is because Windows uses the logon.scr for the screen saver when noone logs on to the server. Windows runs it with the system account which has permissions to change any password.