STEP 1: Press the CTRL + ALT + Delete keys on your keyboard together.
STEP 2: Click on Select ‘Change a password’ and the following screen will appear.
STEP 3: Type in your current password at “Old Password” and type in your new password at “New Password” and “Confirm Password” and then press Enter on your Keyboard.
STEP 4: If done successfully you should see the following screen
STEP 5: Click OK and continue.