Ok sorry for the misunderstanding, but I'm only trying to help
You can change your boot setting in your bios, second menu from top, enter, then choose boot order, enter, set in order you want with enter en cursorkeys, save with F10
How old is it, maybe your battery is slowly dying.
Please post all your specs as in my sig, so when can be more helpful, thanks in advance
Or maybe your bios needs updating?
Are you familiar with bios flashing, or is that to complicated for you, cause I dont know if you build it yourself or your a good amateur, pro, whatever, with pC's
Otherwise read here:https://forum-en.msi.com/index.php?topic=113295.0
and here:http://www.biosflash.com/e/bios-boot-cd.htmBut remember, flashing is at YOUR own risk and us forumusers can not be held responsible for faulty flashing and ended up dead hardware
So do it only as last resort and if you know what your doing.
But as said, please post specs in your sig next, including detailed info over psu, cause those are nasty troublemakers if you've got a bad one