You said you can't get into the admin level. but can you get in at all. if you can't you could just reinstall the OS. Another option (but be warned this dosen't allways work) is to add new hardware sometimes it will log you in automaticly to install it.

Once in the system go into C:\windows\ssytem32\config\Sam.sam and make a copy of the sam file, put it on antoher computer and run a PWG on it, this may take awhile but you shuold get then right PW soon.
Hope this helps!