Option 1: If you have owned another available admin password, it can work. Just log on your PC->Click "Start"button->Control Panel->Add or remove user account->Select the account you want to reset->Change or Remove the password. Then the Windows password will be reset.
Option 2: If not, you’d better download and install a Windows Password Recovery Tool 3.0 to help you remove your lost Windows password, like Windows Password Recovery Standard. It allows you to burn a bootable CD/DVD to remove lost Windows password in Windows 7/Vista/XP, etc. on your own.
Once you get Windows Password Recovery Tool 3.0 , you can follow the blow steps to start. It will only take you less than 5 minutes.
Step 1: Burn a bootable CD/DVD
Step 2: Set your computer to boot from CD/DVD
Step 3: Remove the forgotten Windows password with the burned CD/DVD
Note: If you cannot log in your computer, you can download and install the program in any accessible computer. The CD/DVD can be burned in any computer with any OS.