You are using XP so is the password you're being asked for,the "Administrator" password.
Someone is set up on your PC as administrator [Control Panel/User Accounts]so did that person enter an administrator password?
Just a thought!
This thread is now locked and can not be replied to.
How to get Windows 10 for free | How to install Windows 10: There is still a way to avoid paying…
1995-2015: How technology has changed the world in 20 years
Alex Chinneck’s giant ice cube Christmas tree at Kings Cross