Download a free demo version of Windows Password Key Standard in any accessible PC. Click "Windows Password Key Standard.exe" to install program it. Then follow the instructions below to reset Windows password:
Part1. Burn Program to Vacant CD/DVD
Step1. Run Windows Password Key and click "Browse" to choose the existing Windows Password Key image file. The file is usually located as the default.
Step2. Select "CD/DVD" and specify the CD burning drive from the pull-down list. Insert a blank CD/DVD disk into the CD-ROM drive.
Step3. Click "Burn" to start burning process. It may take a few minutes. Then click OK and eject CD after burning successfully completes.
Part2. Reset Windows Password with Bootable CD/DVD
Step 1: Insert newly created CD/DVD into your password-protected computer and reboot your PC from CD/DVD/USB disk: press "F12" to enter “Boot Menu”. Select CD/DVD disk from the list and then hit "Enter".
Step2. Type ID number of protected Windows installation or 0 to continue or quit operation.
Step3. Type its number of protected account to choose the user whose password you want to reset and press "Enter".
Step4. Type "y" to confirm your operation. After that, you will be asked: 'Reset password for another account? (y/n)'. Type "y" to reset password for another account or type "n" to exit. Eject CD/DVD and restart your PC. Now you can log in your computer without any password.