First of all, you need to download free Windows Password software from below link.
After downloading fully. You need to use WinRAR and extract.
Now install setup into windows and full the installation process.
After installation is full, you need to run your software and click on the UnRegister button above.
Now enter activation serial keys and email address and activate the software.
Now insert DVD/CD or Empty USB Drive into your PC Serial Port.
Now it’s up to you select one of burning method USB or DVD and burn your USB/DVD and make it bootable.
Now eject your DVD/CD or USB and insert your burned USB/DVD/CD into those pc where you have a forgotten password.
Now Restart your PC which you want to reset password and boot on USB or DVD/CD.
After that wait. Software dialogue will be opened. Select your windows and then, select your reset method and click on apply.
Yahoooooooo! You have successfully Removed or Reset your Windows Password within 3 steps.
Now you can restart your Pc and this time your PC no more required the password.