The fastest way to enter BIOS depends on your PC's manufacturer

To enter BIOS, restart your computer and press a specific key repeatedly as it boots up — before Windows loads. The key varies by manufacturer: Dell uses F2, HP and Lenovo use F10, ASUS uses Delete, and Acer uses Delete or F2. If you built your own PC, the key depends on your motherboard maker, which is usually printed on the motherboard itself or listed in your manual.

The timing matters. You need to press the key during the first few seconds after power-on, while the manufacturer's logo is still on screen. If Windows starts loading, you've missed the window — shut down and try again. Some newer PCs with fast boot times give you only a one or two-second window, so mashing the key repeatedly works better than a single press.

If you cannot restart when ready, Windows 11 and Windows 10 offer an alternative: go to Settings > System > Recovery, select Restart Now under Advanced Startup, then choose Troubleshoot > Advanced Options > UEFI Firmware Settings. This method is slower but works if you cannot catch the boot window.

Key Takeaways

  • The key to press during startup varies by manufacturer — Dell uses F2, HP and Lenovo use F10, ASUS and Acer use Delete — and you must press it within the first few seconds after power-on.
  • If you miss the boot window, you can enter BIOS through Windows 11 or 10 by going to Settings > System > Recovery and selecting UEFI Firmware Settings.
  • Pressing the key repeatedly works better than a single press, especially on newer PCs with fast boot times.
  • Your motherboard manual or the manufacturer's website will confirm the correct key if you are unsure.

Finding the right key for your specific PC

Check your computer's documentation first. If you have the manual that came with your PC, the BIOS key is usually listed in the first few pages or in a "Getting Started" section. If you no longer have the manual, visit the manufacturer's support website, search for your exact model number, and look for a quick-start guide or specification sheet.

Your model number is usually on a sticker on the back or bottom of your PC. Write it down before you search — this ensures you get the right key for your exact machine, since some manufacturers use different keys across their product lines.

If you built your PC yourself, the motherboard maker's name is usually printed on the motherboard near the CPU. Common motherboard makers include ASUS, MSI, Gigabyte, and ASRock. Search "[motherboard maker] BIOS key" to find the correct key for your board.

What to do if you cannot catch the boot window

Modern PCs boot so quickly that the manufacturer logo may flash for less than a second. If you repeatedly miss the window, use the Windows method instead. Restart your PC normally, then go to Settings > System > Recovery. Under Advanced Startup, click Restart Now.

Your PC will restart into a blue menu. Select Troubleshoot, then Advanced Options, then UEFI Firmware Settings. Click Restart. Your PC will restart again and enter BIOS. This method takes longer overall but removes the timing pressure.

If you are using Windows 7 or an older version, this method does not work. For those systems, your only option is to catch the key during boot. Consider upgrading to a newer Windows version if you need to enter BIOS frequently.

Entering BIOS on a laptop

Laptop BIOS keys follow the same pattern as desktops, but some laptops require you to hold a function key (Fn) while pressing the BIOS key. For example, on some Dell laptops you hold Fn and press F2 together. Check your laptop's manual to confirm whether Fn is required.

Laptops also boot faster than desktops, so the window to press the key is often shorter — sometimes only one second. Start pressing the key as soon as you press the power button, and keep pressing it repeatedly until BIOS appears.

If your laptop has a physical recovery button or a small hole on the case, check the manual to see if it offers a BIOS reset option. Some manufacturers include this feature for situations where BIOS settings have been changed incorrectly.

Common reasons to enter BIOS

Most users enter BIOS to change the boot order — the sequence in which your PC checks for an operating system to load. This is necessary when installing Windows from a USB drive or when troubleshooting startup problems. You can also change the boot order through Windows settings on newer PCs, but BIOS is the traditional method.

Other common reasons include checking your PC's hardware (CPU, RAM, storage capacity), changing power settings, enabling or disabling hardware features like USB ports, and resetting BIOS to factory defaults if settings have been changed incorrectly. Some users also enter BIOS to check system temperatures or enable overclocking features.

If you are unsure whether you need to change a specific BIOS setting, search for the exact setting name online before making changes. Incorrect BIOS settings can prevent your PC from starting, so only change settings if you know what they do.

What you will see once you are in BIOS

BIOS displays as a text-based menu, usually with a dark background and light text. The layout varies by manufacturer, but most BIOS screens show tabs or menu options at the top, with settings listed below. You navigate using arrow keys and Enter to select options. Some newer BIOS interfaces use a mouse, but keyboard navigation is standard.

The Main tab usually shows your hardware — CPU model, RAM amount, storage drives, and system time. The Boot tab controls the boot order. The Advanced tab contains less common settings. Exit or Save tabs let you save changes and leave BIOS.

Do not change settings unless you know what they do. If you accidentally change something, look for a Reset to Defaults option, usually in the Exit tab. This restores BIOS to its original state without affecting Windows or your files.

Saving changes and exiting BIOS

After making changes, navigate to the Exit tab using arrow keys. Select Save Changes and Exit, then press Enter. Your PC will restart and explore the new settings. If you made a mistake, restart and enter BIOS again to change the setting back.

If you want to leave BIOS without saving, select Exit Without Saving. This discards any changes you made and restarts your PC with the previous BIOS settings intact.

Some BIOS screens ask you to confirm before saving. Read the confirmation message carefully — it will tell you whether your changes will take effect when ready or after the next restart.

Frequently Asked Questions

What if I do not know my PC's manufacturer?

Right-click the Start menu and select System. Under Device Name, you will see your PC's model number. Search this model number on Google — the first result usually tells you the manufacturer. Alternatively, look at the physical case — the manufacturer's logo is usually printed on the front or back.

Can I damage my PC by entering BIOS?

straightforward entering BIOS and looking around does not damage anything. Changing settings can cause problems if you do not know what they do, but you can always reset BIOS to factory defaults. The only real risk is changing settings related to power or overclocking, which can cause your PC to overheat or fail to start.

Why does my PC not respond when I press the BIOS key?

You may be pressing the wrong key, pressing it too late, or your keyboard may not be responding during boot. Try pressing the key when ready after powering on, before any logo appears. If that does not work, try a different key from your manufacturer's list. Some PCs also require you to hold the key rather than tap it.

Will entering BIOS erase my files or Windows?

No. Entering BIOS and viewing settings does not affect Windows or your files. Changing certain settings can prevent Windows from starting, but resetting BIOS to defaults will fix this. Your files are stored on your hard drive and are not touched by BIOS changes unless you specifically change boot settings.

Can I enter BIOS if my PC will not start?

Yes. Even if Windows will not load, you can usually still enter BIOS by pressing the key during startup. This is useful for troubleshooting — you can check whether your hard drive is detected in BIOS, which tells you whether the problem is hardware or software.