Resetting a user’s password within Windows isn’t too hard. All that is required is access to the administrator account. The administrator account has ultimate control over the computer. For this reason, resetting the administrator account password is a bit more difficult than resetting the password for a regular account. The administrator must create a password reset disk using a USB flash drive, and can then reset the password.
Log in to Windows using the administrator account. Insert a USB flash drive into an open USB port.
Open the Windows "Start" menu, type “user accounts” into the “Search” box and hit Enter to launch the “User Accounts” control panel. You can optionally get to this utility via “Start" > "Control Panel.”
Click “Create a password reset disk.” The “Forgotten Password Wizard” window opens. Click “Next.”
Select the USB drive from the drop-down menu and click “Next.” Enter the current password and click “Next” to begin creating the disk. Click “Finish” when the process completes.
Insert the password reset disk into an open USB port. Restart the computer.
Click “Reset Password” when prompted for the login password. The “Reset Password Wizard” will launch. Click “Next.”
Select the drive containing the USB flash drive and click “Next.” Enter the new password and click “Next.” Click “Finish” when the process completes. Log in to your Windows administrator account using the new password.