can a computer change date and time itself?
pretend an old junk computer.... is it posible that it can change date and time itself?
if you talking about a computer you use then yesit can and it is supposed to check and set the time correctly.
it sets the time by the time zone you enter or at the default time zone the operating system starts with at install.
if something, ie... a virus or worm got into the operating system and started messing with default settings, ie... trying to turn off protective settings, then you may see weird time setting on your computer.
if you reset it and it changes again then you have a serious problem to address because you will have malicious software running on your system.
or are you wanting to set up an old computer and clock acting screwy?
if thats the case then check for a dead bios battery causing bios to reset when you power off.