Is it possible to change the date and time of the system from the Welcome screen, without being logged in into the system?I came from school and turned on my computer and the date of the system was 3.4. 1981 I have suspicion of my friends to make fun and change it, but I don't know how, since they don't know my password (I'm absolutely sure).Thank you for the answer.shacull

check the battery on you computer or check the bios you could reset date their