If you have always been hitting F1 key when booting your computer, then this is the solution.
This normally happens when time and date are not set correctly. Try and set the date and time correctly, either you set from the setup menu or boot before you set.
After you have finished setting time and date, save your settings and switch the computer off by removing the power cable from the electricity socket.
Switch on the machine again and see if the problem still persist, then switch off the computer again and open the case of the computer you will see a small battery like the one in a wrist watch as shown in the image below.
Remove the battery and replace with new one. Switch on the device and set date and time again.
Save your settings and reboot and you are good to go without hitting F1 or any key again.
The purpose of this battery is to save some some settings in the computer for example date and time. So if the battery is not working, it can not save the date and the time.
