You may find your computer clock wrong if the server is unable to be reached or for some reason is returning an incorrect time. Your clock may also be wrong if the time zone settings are off.

If your Windows 11 computer is showing the wrong time, check if the time zone is correct in Settings > Time & Language > Date & Time. Ensure “Set time automatically” is enabled.

Surrounded by computer screens in a modern office, you may check your monitor instead of a wristwatch to verify the current time. However, an incorrectly set system clock can cause more problems ...

But there’s no reason a computer can’t run at a much slower speed, as [Greg] demonstrates in this video where he slows down a 6502 processor to a single clock cycle per second.