The fastest way to open BIOS depends on your computer's manufacturer

To open BIOS setup, you restart your computer and press a specific key during the startup sequence — before Windows or your operating system loads. The key you press depends on who made your computer: Dell machines usually need F2, HP and Lenovo typically use F10 or Del, and Asus boards often respond to Del or F2. The timing matters: you have only a few seconds after you press the power button, so you need to start pressing the key immediately and keep pressing it until the BIOS menu appears.

If you are not sure which key your computer uses, the fastest way to find out is to restart, watch the screen carefully during startup, and look for text that says "Press [key] to enter Setup" or "Press [key] for BIOS." Most computers display this message for a few seconds. If you miss it, restart and try again — there is no penalty for pressing the wrong key during startup.

Key Takeaways

  • Restart your computer and press a specific key during startup — usually F2, F10, or Del — before your operating system loads.
  • The correct key depends on your computer's manufacturer: Dell often uses F2, HP and Lenovo use F10 or Del, and Asus typically uses Del or F2.
  • You have only a few seconds after pressing the power button, so begin pressing the key immediately and hold it down or press it repeatedly.
  • If you miss the window, simply restart your computer and try again — pressing the wrong key during startup causes no damage.
  • Once inside BIOS, use arrow keys to navigate and Enter to select; look for an on-screen menu or help text to understand what each setting does.

Finding your computer's BIOS key before you restart

If you want to know the correct key without trial and error, check your computer's documentation or the manufacturer's website. Dell, HP, Lenovo, Asus, and other makers publish support pages that list the BIOS key for each model. You can also look at your computer's case or motherboard manual if you have it — the BIOS key is often printed on the case near the power button or listed in the manual's first few pages.

Another option is to search online for your specific computer model plus "BIOS key" or "enter setup." For example, searching "Dell XPS 13 BIOS key" will show you that Dell XPS machines use F2. This takes a minute but saves you from guessing during the restart sequence.

The timing and technique for pressing the key

The moment you press the power button, start pressing your BIOS key repeatedly — do not wait to see if anything happens. Press it once per second or hold it down continuously. Most computers will detect the key press within the first few seconds of startup and open BIOS instead of loading the operating system.

If your computer boots into Windows or your normal operating system instead of BIOS, you waited too long or pressed the wrong key. Restart immediately and try again. There is no harm in restarting multiple times — this is a normal troubleshooting step.

Some newer computers, especially those with fast solid-state drives, boot so quickly that the BIOS key window lasts only one or two seconds. If you have a newer computer and keep missing the window, try restarting and pressing the key as soon as you see the manufacturer's logo appear on screen.

What to do if you cannot find the BIOS key for your computer

If you have tried the common keys (F2, F10, Del) and none of them work, try F1, F12, or Esc — some manufacturers use these instead. If you still cannot enter BIOS, search online for your exact computer model. Include the full model number if you can find it: look on the case, in Windows Settings under "System," or in the Device Manager.

If you are using a laptop, the key might be different from a desktop. Some laptop manufacturers require you to hold Fn while pressing the BIOS key, or they use a different key entirely. For example, some Lenovo laptops use Fn + F2 instead of just F2.

Navigating inside BIOS once you are in

Once BIOS opens, you will see a menu with options like "Boot," "Security," "System Information," or "Advanced." Use your arrow keys to move between options and Enter to select. Do not use your mouse — BIOS runs before your operating system loads, so the mouse usually does not work.

Most BIOS menus display help text on the right side of the screen or at the bottom that explains what each setting does. Read this text before changing anything. If you are not sure what a setting does, leave it alone — changing the wrong setting can prevent your computer from starting.

To exit BIOS without saving changes, look for an "Exit" option or press Esc. To save changes and restart, look for "Save and Exit" or "Exit and Save Changes." The exact wording varies by manufacturer, but the option is always visible in the main menu.

Common reasons people need to open BIOS

Most people open BIOS to change the boot order — the sequence in which the computer checks for an operating system to load. This is necessary if you are installing Windows from a USB drive or trying to boot from an external device. You can also open BIOS to check hardware information, enable or disable built-in devices like the camera or Wi-Fi, or adjust security settings.

Some people open BIOS to check system temperatures or fan speeds, though not all BIOS menus display this information. Others need to enter BIOS to clear a forgotten password or reset the computer to factory settings, though the exact steps for these tasks vary widely by manufacturer.

Frequently Asked Questions

What happens if I press the wrong key during startup?

Nothing happens — the computer continues to boot normally. Simply restart and try the correct key. Pressing the wrong key during startup causes no damage to your computer or files.

Can I open BIOS from inside Windows?

On Windows 10 and 11, you can restart into BIOS without the timing pressure. Go to Settings > System > Recovery, click "Restart now" under "Advanced startup," then select "Troubleshoot" > "Advanced options" > "UEFI Firmware Settings." This opens BIOS after the restart without requiring you to press a key at the right moment.

Will changing BIOS settings break my computer?

Changing most BIOS settings will not break your computer, but changing the wrong setting can prevent it from starting. If this happens, restart and enter BIOS again, then look for a "Reset to Defaults" or "Load Defaults" option to restore the original settings.

How do I know if my computer uses BIOS or UEFI?

Both BIOS and UEFI are firmware systems that work the same way from the user's perspective — you enter them the same way and navigate the same way. UEFI is newer and has a slightly different menu layout, but the process for opening it is identical. You do not need to know which one your computer uses.

Is it safe to change the boot order in BIOS?

Yes, changing the boot order is safe and is one of the most common BIOS changes. The boot order simply tells your computer which device to check first for an operating system. You can change it back anytime by entering BIOS again and selecting a different order.