Invalid User Name and Password

[Guest]

I have tried many things to log on to Windows. I was trying to conect my notebook to a new network when I deleted the old network it said windows needs to be restarted. So I restarted, then when it booted back up the old password and user name I have been using for a year were invalid. I have tried leaving the user name and password blank, type administrator in the user name and left the password blank, typed adminstrator and typed my old password with it, type guest w/password and w/out password, hit space bar one time for password, please help.

 

[GwD]

If you "deleted the old network" and it was a Domain then you have axed the
username and password for your machine. Unless you know the Administrator
password you will have to reinstall XP.

I have tried many things to log on to Windows. I was trying to conect my

notebook to a new network when I deleted the old network it said windows
needs to be restarted. So I restarted, then when it booted back up the old
password and user name I have been using for a year were invalid. I have
tried leaving the user name and password blank, type administrator in the
user name and left the password blank, typed adminstrator and typed my old
password with it, type guest w/password and w/out password, hit space bar
one time for password, please help.