Yep , but you see, common or not common, each machine/make/model may have a different way to access the BIOS (not entirely unlike on "normal" PC's the procedure is via DEL or F2 or another F key or ESC) on tablets it is something like "press together volume + and power switch for 4 seconds then release the power switch" (while if a keyboard is connected AND the BIOS "sees" it then one of the mentioned keys may work), example:
0) it is not a Surface.
1) it is not a Dell Venue 11 pro.
2) Is it a Samsung ATIV?
https://www.samsung.com/ca/support/computing/how-do-i-access-the-bios-on-a-tablet-pc/
(if you wish to provide it of course) the EXACT brand/make/model would avoid the senseless guessing game, saving o everyone a lot of time and hopefully avoiding botched attempts with incorrect methods.
Anyway I now asked you (I presume nicely enough) the EXACT brand/make/model TWICE, I won't ask that info a third time[1].
jaclaz
[1] Remember it is you (or your friend) that are having an issue and we are only trying to help/assist you to solve it, though the guessing game could be fun, it will take (maybe, it depends on how many kids want to play it) a loooooong time ....