imma just say lmao, install a keylogger rofl, no srsly... imma pretty sure there is a way on this site... there is a tut tho... U can google "recover administrator password"... that mite help a little...
but i gotta ask, how the heck did u install it in the first place without admin rights...?
If need be, use a key logger... google that, but DONT get malware... its waaay to easy... OR u could code ur own lol plenty of VB tuts on google