To increase your computer's security, it is recommended to use a system password. Learn how to change the operating system password. Watch in English http://vps.ktudu.com/downloads/keep/cd-testing/video-aulas/en/How%20to%20change%20password.mp4 Watch in Brazilian Portuguese http://vps.ktudu.com/downloads/keep/cd-testing/video-aulas/pt/Como%20alterar%20a%20senha.mp4 Watch in Spanish http://vps.ktudu.com/downloads/keep/cd-testing/video-aulas/es/C%c3%b3mo%20cambiar%20la%20contrase%c3%b1a.mp4