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

The BIOS (Basic Input/Output System) is the firmware that runs before Windows starts up. You reach it by restarting your computer and pressing a specific key during the boot process — usually Delete, F2, F10, or F12, depending on whether your computer is made by Dell, HP, Lenovo, ASUS, or another manufacturer.

The key you need appears briefly on your screen as the computer starts, often in the bottom corner with text like "Press DEL to enter Setup" or "Press F2 for System Settings." If you miss it, restart and watch for it again. You have only a few seconds before Windows loads.

If you cannot see the message, your computer's manufacturer publishes a list of which key to use. Dell and HP machines almost always use F2 or Delete. Lenovo ThinkPads typically use F1 or Enter. ASUS boards use Delete or F2. Acer and other brands vary, so a quick search for your model number plus "BIOS key" will tell you exactly which one to press.

Key Takeaways

  • The BIOS key appears on your screen during startup and is usually Delete, F2, F10, or F12 — watch for it as your computer boots.
  • You must press the key before Windows loads, which takes only a few seconds, so you may need to restart and try again if you miss it.
  • If you cannot see the startup message, search your computer model number plus "BIOS key" to find the correct one for your machine.
  • Windows 10 also offers a faster BIOS entry method through Settings if your computer supports it, avoiding the restart timing problem.

Using Windows 10 Settings to enter BIOS without restarting

Windows 10 includes a built-in method to restart directly into BIOS without having to catch a key during startup. Open Settings by pressing Windows key + I, then go to System, then Recovery. Under "Advanced startup," click "Restart now."

Your computer will restart into a blue menu with several options. Click "Troubleshoot," then "Advanced options," then "UEFI Firmware Settings." Windows will restart again and take you directly into BIOS. This method works on most newer computers and removes the guesswork of timing a key press.

If you do not see "UEFI Firmware Settings" in the Advanced options menu, your computer does not support this method — use the key-press approach instead. This is common on older machines or those with older BIOS versions.

What to do if you cannot find the right BIOS key

If the startup message is too fast to read or does not appear at all, restart your computer and try the most common keys one at a time: Delete, then F2, then F12. Press the key repeatedly as soon as you see the manufacturer's logo, before any text appears. Hold it down for a second or two rather than tapping once.

If none of those work, look up your specific computer model. Search "[Your computer brand] [your model number] BIOS key" — you can find your model number in Settings under System, then About. The manufacturer's support page will list the exact key and sometimes a video showing when to press it.

Some computers, particularly older ones or those with custom builds, may have BIOS access disabled in firmware settings. If you have tried the correct key multiple times and nothing happens, contact the manufacturer's support line or a local computer repair shop — they can help you determine whether BIOS access is locked.

Common reasons you might need to enter BIOS

You enter BIOS to change boot order (which device your computer starts from), enable or disable hardware components, check temperatures and fan speeds, or update the BIOS itself. You might also need it to turn on virtualization features for certain programs, change RAM timing, or troubleshoot hardware that Windows does not recognize.

If you are trying to boot from a USB drive to install Windows or run a repair tool, you will need to change the boot order in BIOS. If you are experiencing random shutdowns or freezing, checking temperatures in BIOS can tell you whether your computer is overheating. Most everyday computer problems do not require BIOS access — if you are unsure whether you need it, the troubleshooting guide that sent you here will tell you specifically.

Navigating BIOS safely once you are inside

BIOS looks different depending on your manufacturer, but the layout is usually similar: a menu on the left, settings in the middle, and help text on the right. Use arrow keys to move between options and Enter to select. Do not use your mouse — BIOS predates modern pointing devices and usually does not respond to it.

Change only the setting you came to change. BIOS controls fundamental hardware behavior, and changing the wrong setting can prevent your computer from starting. If you accidentally change something, look for a "Load Defaults" or "Reset to Default" option before exiting — most BIOS menus have this near the bottom or in a separate menu.

When you are finished, look for "Save and Exit" or "Exit and Save Changes." BIOS will ask you to confirm, then restart your computer and load Windows normally. If your computer does not start after a BIOS change, restart and go back into BIOS to undo the change or load defaults.

Differences between BIOS and UEFI

Newer computers use UEFI (Unified Extensible Firmware Interface) instead of traditional BIOS. UEFI is faster, supports larger hard drives, and sometimes includes a graphical interface with a mouse. The process to enter it is the same — press the same key or use the Windows 10 Settings method — but UEFI menus look more modern and may be easier to navigate.

From a user perspective, UEFI and BIOS work the same way: you restart, press a key, change settings, and save. The main difference is that UEFI is the newer standard and is now standard on all new computers. If your computer was made after 2012, it almost certainly uses UEFI, though it may still be called "BIOS" in the startup message.

Frequently Asked Questions

What if I press the BIOS key but Windows starts anyway?

You likely pressed the key too late. Restart your computer and begin pressing the key as soon as you see the manufacturer's logo, before any text appears. Press and hold it for a second or two rather than tapping once. If you keep missing the timing, use the Windows 10 Settings method instead — it is more reliable.

Can I damage my computer by changing BIOS settings?

You can prevent your computer from starting if you change the wrong setting, but you cannot physically damage the hardware. If something goes wrong, restart and go back into BIOS to undo the change or load default settings. If your computer will not start at all, you may need to contact the manufacturer or a repair shop.

Is it normal for BIOS to look different than what I see in videos?

Yes. BIOS looks different on every manufacturer's computers, and even different models from the same manufacturer can vary. The basic navigation is the same — arrow keys to move, Enter to select — but the menu layout and available options will differ. Look for the specific setting you need rather than following a video exactly.

Do I need a password to enter BIOS?

Most computers do not have a BIOS password by default. If you see a password prompt when you try to enter BIOS, someone set one intentionally — you will need that password to proceed. If you do not know it, contact the person who set it up or the computer manufacturer.