Password bypass for Win2000

is there a way to bypass the windows login password. This system use to login locally. the user indicates that he tried to set it up for networking and now the system stops at the login screen and will not log in without a password. (i.e. at the login screen reads “Administrator” and the password box is blank, use to be able to click OK… now when you click OK the system attempts to login, and then back to the login screen with the message unable to login ck to see if cap lock is on ect.) The user seems to have forgot the administrator’s password. Is there a way around this. Can we access the desktop again??? This system is running windows 2000 professional. Your help would be appreciated. Thank you