Mt laptop thinkpad says error for administrator password help

[mygingerkid]

i deleted windows XP and then reinstalled it and now it says error i just clicked the green arrow and it says does not exist, and tried old password says the same thing what do i do, Can u please help me

 

[hang-the-9]

When you install XP it asks you for the user you want to use, log on as that user you created. The default administrator password is blank, none of your old passwords will work since you re-installed Windows and your old accounts are no longer there in that setup.