F1 is most probably for default BIOS settings.
You will need to press DEL and get into the BIOS and change the settings to the way you want them to be. After saving and exiting the BIOS, if it reverts back to the same screen, then you most probably need to change the CMOS battery which is on the Mobo.
Choose the right date and time and boot order in the BIOS before saving and exiting and see if it works.