How to enable Dolphin to use 2 cores?

[Shonumi]

That's very odd that you can't access the BIOS/UEFI. You're sure you can't get into it by pressing one of the keys during boot commonly used to enter the BIOS/UEFI (F2, F8, F9, Delete are some ones I've seen)? I can't imagine access to the BIOS/UEFI totally being restricted since that makes it quite difficult to do common tasks (common for some people at least) like boot from a USB stick or external drive. Try mashing the F* keys and see if anything happens.