To enter BIOS on a computer, the most common way is to press a specific key during the computer's startup before the operating system loads. This key varies depending on the manufacturer but often includes Del, F2, F10, Esc, or F12. You usually need to press this key repeatedly right after powering on the computer until the BIOS setup screen appears. If accessing BIOS via the startup key is difficult because the boot process is very fast, there are alternative methods through the operating system settings:

• On Windows 10 or Windows 11, go to Settings > Update & Security > Recovery, then under Advanced startup click "Restart now." After rebooting, navigate to Troubleshoot > Advanced options > UEFI Firmware Settings and click Restart to enter BIOS.
• Another approach is holding the Shift key while clicking Restart from the Start menu to access the Advanced Startup Options, which also leads to BIOS settings.

Some common manufacturer BIOS keys are:

• Acer: F2 or Del
• ASUS: F2 or Del
• Dell: F2 or F12
• HP: Esc or F10
• Lenovo: F2, Fn + F2, F1 (desktop), Enter + F1 (ThinkPads)
• MSI: Del

For tablets like Microsoft Surface, pressing and holding the volume up button at startup enters BIOS. If these methods do not work, consulting the PC's manual or manufacturer's website for the exact key or method is advised.