Help! I Need To Rescue One Of My Local Computers In My Network:

Good day everyone,
please i have an issue to deall with in the office. Am one of the network/system administrators at my place of wr. one of our host computer is having a problem and we don't have the system recovery cd. we tried logging into the system as admin when its connected to the netwrk, it won't take the password. tried loggin in as the local admin, password was not accepted. this system is an old one, and none of us were in employment when it was bought. right now we don't want to re-install windows 2000 since we need the vital info stored & software running in the system. As for the software running, we do not have the original installation package. all i need si that can there be a way i can CRACK the password of the local admin?