Step 1: Log on to the account who owns the credential of an administrator account.
Step 2: Click the Start button with typing lusrmgr.msc into the Search box, and press Enter .
Then Local Users and Groups opens. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Step 3: Double-click Local Users and Groups, and then click Users.
Step 4: Right-click the account that you need to reset the password for, and then click Set Password.
Step 5: Type and confirm the new password.