Newer model notebooks have no CMOS battery (RTC battery) so it is not going to be the failure. You have a brand new PC which is showing the wrong time after every reboot. Now let’s quickly take a look at a few scenarios: Set the correct date and time and exit BIOS saving changes Turn on PC and continuously press ESC until startup menu appears You can also check if the correct time is set in BIOS. you can also leave automatic time synch switched on which will check with a server and synch the correct time to the PC. check you have the correct time zone for your country Is the time set correctly in Windows Settings (right-click on the clock in the lower corner of the desktop and click on change date/time).
Naturally, it is also always useful to just know what time it is The correct time is important for such things as updates (which can be blocked) and various software which will not run with the incorrect time. This basically deals with the problem when your PC is showing the incorrect time in Windows even after you may have adjusted it various times in settings.
