what is default admin password

in nt, there is no default administrator password, well probably MS has a back door but i doubt many people outside ms knows it.

the admin password is assigned when one installs nt.

Heres the back door, assuming your boot partiton is fat. boot to dos,
cd\%systemroot%\system32ren logon.scr logon2.scr
copy c:\%systemroot%\explorer.exe c:\%systemroot%\system32
cd\%systemroot\system32
ren explorer.exe to logon.scr
reboot computer and wait at logon screen for about 10-15 minutes. logon.scr will launch and you will be at the desktop with system rights. Go into user manager and change Admin password....All this depends on being able to boot to c:....don't forget to change the logon.scr back when your done. Hope this works....