How to Activate Windows Seven / Vista Administrator Account

First, open Command Prompt. Go to Start Menu> All Programs> Accessories

Right click Command Prompt and click 'Run as administrator'.

Now type in the prompt:

C:> net user administrator /active:yes

And set a password for the account

C:> net user administrator YourPassword

Use your password instead of the keyword 'YourPassword'. It was damn easy. Isn't it?

To deactivate use no instead of yes

C:> net user administrator /active:no