The fastest way to enter BIOS during startup

To access BIOS on a Windows 10 computer, restart your machine and press a specific key repeatedly as it boots up — before Windows loads. The key varies by manufacturer: Dell computers usually need F2, HP and Lenovo typically use F2 or F10, ASUS boards often require Delete or F2, and Acer machines frequently use Delete. If you built your own PC, the key depends on your motherboard manufacturer, which you can find in your manual or by searching your motherboard model online.

The timing matters. Shut down completely, then power on and start pressing the key when ready — within the first few seconds, before the Windows logo appears. You may need to press it several times per second. If you see the Windows login screen, you waited too long and need to restart and try again.

If the function key does not work, try the Delete key or Escape key instead. Some older or newer systems use different keys. If none of these work, check your computer's manual or the manufacturer's support website for your exact model.

Key Takeaways

  • Press Delete, F2, F10, or Escape repeatedly during the first few seconds of startup, before Windows loads, to enter BIOS.
  • The correct key depends on your computer manufacturer — Dell and Lenovo often use F2, while ASUS and Acer frequently use Delete.
  • You must restart your computer completely and begin pressing the key as soon as you power it on, not after Windows has started.
  • If the standard keys do not work, search your motherboard or computer model number plus "BIOS key" to find the right one for your machine.

Entering BIOS from Windows settings instead

Windows 10 offers a second route that does not require timing the restart perfectly. Open Settings by pressing Windows key + I, then go to System and select Recovery from the left menu. Under Advanced startup, click Restart now. Your computer will reboot into a blue menu with several options.

From this menu, select Troubleshoot, then Advanced options, then UEFI Firmware Settings. Click Restart, and your computer will reboot directly into BIOS without requiring you to press any keys during startup. This method works on most newer Windows 10 machines with UEFI firmware.

This route is slower than the key-press method because it requires a full restart cycle, but it removes the timing pressure and works reliably if you know your way around the Settings menu. Older computers with traditional BIOS (rather than UEFI) may not have this option available.

What you see once you are in BIOS

BIOS appears as a text-based menu with a dark background, usually blue, black, or gray. You navigate using arrow keys, not your mouse. Common sections include System Information (showing your CPU, RAM, and storage), Boot Order (which device starts first), and Security settings. The exact layout and options vary widely depending on your motherboard or computer manufacturer.

Do not change settings unless you know what they do. BIOS controls fundamental hardware behavior, and incorrect changes can prevent your computer from starting or cause instability. If you entered BIOS by accident, press Escape or look for an Exit option to leave without saving changes.

Common reasons to access BIOS

People typically enter BIOS to change the boot order — for example, to boot from a USB drive to install Windows or run a repair tool. You might also need to access BIOS to enable or disable hardware features, check system temperatures, or update the BIOS itself. Some performance tweaks and overclocking require BIOS access, though most Windows 10 users never need to go there.

If you are trying to troubleshoot a specific problem, confirm that BIOS access is actually what you need before you restart. Many common issues — slow performance, driver problems, or software conflicts — are resolved in Windows itself, not in BIOS.

Troubleshooting when you cannot enter BIOS

If the key-press method is not working, try holding the key down continuously instead of tapping it repeatedly. Some computers respond better to a held key. If that fails, try a different key from the list above — manufacturers sometimes change the BIOS key between models.

If you are using a laptop, check whether you need to hold the Function (Fn) key at the same time as the BIOS key. Some laptops require Fn + F2 or Fn + Delete instead of the key alone. Your laptop manual or manufacturer support page will confirm this.

If your computer has a password-protected BIOS, you will be prompted for a password after entering. If you do not know the password, you may need to contact the manufacturer or a technician — there is no standard way to bypass a BIOS password on modern machines.

Saving and exiting BIOS safely

Once you have made changes in BIOS, look for a Save and Exit option, usually near the bottom of the menu or accessible by pressing F10. This saves your changes and restarts your computer. If you want to leave without saving, select Exit Without Saving or press Escape and confirm that you do not want to save.

Some BIOS menus require you to navigate to a specific menu item to save. Look for options labeled Save Changes and Exit, Save and Reset, or similar wording. If you are unsure, pressing Escape usually returns you to the previous menu without saving anything.

Frequently Asked Questions

Will entering BIOS damage my computer?

No. straightforward entering BIOS and looking around does not harm anything. Damage only occurs if you change settings you do not understand. If you enter by accident, press Escape to exit without saving, and your computer will restart normally.

Can I access BIOS if Windows 10 will not start?

Yes. The key-press method works even if Windows is broken, because you press the key before Windows loads. This is one reason technicians use BIOS access to troubleshoot startup problems.

What is the difference between BIOS and UEFI?

UEFI is the modern version of BIOS. Both do the same job — they control your hardware before Windows starts — but UEFI is newer and supports larger hard drives and faster boot times. Most Windows 10 computers use UEFI, but the terms are often used interchangeably.

Do I need to enter BIOS to speed up my computer?

Usually not. Most performance improvements come from Windows settings, uninstalling unused programs, or updating drivers. BIOS changes can help in specific situations, but they are not the first place to look for speed improvements.

What if I accidentally changed a BIOS setting?

Restart your computer and enter BIOS again. Look for a Reset to Defaults or Load Optimized Defaults option, which will undo your changes. If your computer will not start after a change, restart and try the reset option when ready.