How to change your windows username without knowning the current one

Hello there, I'm just going to make a small blog on how to change your windows account password without knowing the current one.

Firstly open up command prompt, to do this press 'Start', 'Run'; then type in cmd - now click enter on your keyboard.
Once command prompt is open type cd\ - once that is done type net user username password - put your current username where 'username' has been placed, but with 'password' put the new password you wish to have on that specific account.

I really don't know why i'm making this blog, it's my first ever one. :)
*woooo*