List of keys to access the Bios and other pre-operating system options ordered by brands.
These keys have to be pressed before the Windows logo or Mac OS or Linux appears to be able to access the BIOS (or other functions) and configure it.
Acer
F2 (BIOS Setup)
ALT + F2 (Boot Device Options)
F12 (Boot Device Options)
ALT + F10 (Acer eRecovery)
Asus
ESC (Boot Selection Menu)
F2 (BIOS Setup)
F9 (Asus Laptop Recovery)
Apple (Models 2006+)
Command + Option + P + R (PRAM and NVRAM Reset)
Command + S (Boot into Single-User Mode)
Command + V (Boot with Verbose Status)
Option (Select Hard Drive Boot Volume)
Option + N (Boot Image from Netboot Server)
Shift (Boot into Safe Mode)
C (Boot from CD Drive)
D (Boot from OS/X Recovery and perform Hardware Test)
N (Boot from Network)
Dell
CTRL + F11 (Dell™ PC Restore by Symantec)
F8 (Repair Your Computer) Dell Factory Image Restore
EI Systems
F10 (System Recovery)
Fujitsu
F2 (BIOS Setup)
F12 (Boot Menu)
Gateway
F11 or R (Gateway Recovery)
HP / Compaq Desktops
F10 (HP Recovery)
HP Pavilion / Compaq Laptops
ESC (Startup Menu)
F1 (System Information)
F2 (System Diagnostic)
F9 (Boot Device Options)
F10 (BIOS Setup)
F11 (System Recovery)
IBM ThinkPad
F11 (IBM Product Recovery)
Intel NUC
F2 (System Setup)
F7 (BIOS Update)
F10 (Boot Menu)
iRULU Walknbook
ESC (Boot Device Options)
Lenovo
(Lenovo OneKey Rescue System)
F1 or F2 (BIOS Setup)
F12 (Multi boot)
Enter (Options)
Packard Bell
F11 (Recovery Program)
Sony Vaio
F10 (VAIO Recovery Wizard)
Toshiba
0 (zero) (Toshiba Harddrive Recovery Utility)
F2 (Setup Utility)
F8 (Advanced Boot Options Menu)
F12 (Boot Menu)