Reboot and keep hitting ESC, F2, F8, F10 or whatever the computer requires… But, there is another way, which I found out trying this for an old ASUS Transformer T100.
According to Asus: Press and hold the F2 button, then click the power button. DO NOT RELEASE the F2 button until the BIOS screen display.
Of course this does not work, why else would I write about it?
THE SHORT ANSWER: The Asus T100 is a normal PC and so you can enter the BIOS by rapidly pressing the F2 key on boot up.
BUT THERE ALSO IS A LONG ANSWER: To be precise the Asus T100 and most newer computers have scrapped the old, small and slow BIOS (Basic Input Output System) in favour of the new Intel and Microsoft designed UEFI (Unified Extensible Firmware Interface). The UEFI standard is fast; so fast that you likely will have trouble catching the F2 option on boot and be forced to try several times to get into the UEFI.
So to solve this problem you could choose to go into the OS, go to Advanced Startup options, then choose to reboot to the “UEFI Firmware Settings”.
Have a nice day…