How to change the password without knowing the old one

What if we have forgotten the administrator password? Even if the auto-login is set, we cannot change the password without knowing the old one.

But, there is an easy way to change it from the command prompt. No, no, don't be scared, it is so easy!!!

  1. Open a "Run" window (click con start and then Run; or press windows key + R)
  2. Type net user username newpassword
  3. You are done!

For example, if my user name is Goofy, and I wanna set as password Donald, I will type:

net user Goofy Donald