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

To open BIOS, restart your computer and press a specific key during startup — before Windows or your operating system loads. The key varies by manufacturer: Dell and Lenovo machines usually respond to F2, HP and Compaq to F10, Asus to Delete, and Acer to Delete or F2. Some older machines use F1 or Ctrl+Alt+Esc. You have only a few seconds after power-on to press the key, so you may need to restart several times to catch the window.

If you are not sure which key your machine uses, look for a prompt on the startup screen — most manufacturers display "Press [key] to enter Setup" during boot. If you miss it, the computer will load your operating system normally, and you will need to restart and try again. There is no penalty for missing the window; you straightforward restart and try once more.

On newer computers, especially those with fast solid-state drives, the startup screen may flash too quickly to read. In that case, you can force the BIOS screen to appear by restarting from within Windows: hold Shift while clicking Restart, then look for an option like "Troubleshoot" or "Advanced Options," which often includes a "Restart to BIOS" or "UEFI Firmware Settings" choice.

Key Takeaways

  • The key to press during startup is different for each manufacturer — Dell uses F2, HP uses F10, Asus uses Delete — and you have only a few seconds to press it.
  • If you miss the window, straightforward restart your computer and try again; there is no harm in restarting multiple times.
  • On newer computers with fast boot times, you can restart from Windows using Shift+Restart and select a UEFI or BIOS option from the menu instead.
  • Once inside BIOS, do not change settings unless you know what they control — accidental changes can prevent your computer from starting.

Finding your manufacturer's specific key

The startup screen usually displays the correct key in small text at the bottom or top of the screen. Look for phrases like "Press F2 to enter Setup," "Press Del for BIOS," or "Press F10 for System Configuration." This message appears for only two to five seconds, so you may need to restart your computer a few times to read it clearly.

If you cannot read the startup screen, check your computer's manual or the manufacturer's website. Search for your exact model number — you can find this by right-clicking "This PC" or "My Computer" in Windows and selecting Properties, or by looking at a sticker on the bottom or back of your machine. Once you have the model number, search "[manufacturer] [model] enter BIOS" or "[manufacturer] [model] setup key."

For brand-name computers (Dell, HP, Lenovo, Asus, Acer), the key is usually consistent across models from the same year. If you have owned the same brand before, the key is likely the same. If you are working on someone else's computer and cannot find documentation, F2 and Delete are the most common keys across all manufacturers, so try those first.

Restarting your computer to access BIOS

The most reliable method is a full power-off restart. Close all open programs, then click the Start menu, select Power, and click Restart. Once the screen goes black, begin pressing your manufacturer's key repeatedly — do not hold it down, but tap it every half-second or so. You should see the BIOS screen appear within a few seconds.

If you are using a laptop, the process is the same, but the key press window may be even shorter. Some laptops require you to hold the key down rather than tap it. If tapping does not work, try holding the key down for the first three seconds after power-on.

If your computer is frozen or not responding, you can force a restart by holding the power button for ten seconds until the screen goes black, then releasing it and pressing the power button again to turn it back on. This is harder on your machine than a normal restart, so use it only when the computer will not respond to normal shutdown commands.

Using Windows to restart directly into BIOS

On Windows 10 and 11, you can reach BIOS without timing a key press. Click the Start menu, then Settings (the gear icon). In Settings, select System, then click Recovery on the left side. Under "Advanced startup," click Restart now. Your computer will restart into a blue menu with several options.

From this menu, select Troubleshoot, then Advanced Options, then UEFI Firmware Settings (or "BIOS Settings" on some machines). Click Restart, and your computer will reboot directly into BIOS. This method removes the timing pressure and works reliably on modern Windows machines.

This method does not work on older Windows 7 machines or on computers that use traditional BIOS rather than UEFI firmware. If the UEFI Firmware Settings option does not appear, use the key-press method instead.

What you will see once BIOS opens

BIOS looks different depending on your manufacturer, but all versions show a menu with tabs or categories at the top and settings listed below. Common tabs include Main (showing your processor, RAM, and hard drive), Boot (controlling which device starts first), Security (for passwords), and Advanced (for technical settings most users should not change).

The screen will have instructions at the bottom showing which keys navigate the menu: usually arrow keys to move between options, Enter to select, and Esc or F10 to save and exit. Read these instructions before making any changes. If you are only looking at BIOS to check a setting or prepare for a firmware update, you do not need to change anything — straightforward look at what you need and press Esc to exit without saving.

Do not change settings unless you have a specific reason to do so. Accidental changes to boot order, RAM timing, or security settings can prevent your computer from starting. If you do make a change by mistake, look for a "Load Defaults" or "Reset to Defaults" option in the menu, which will undo all changes.

Exiting BIOS without making changes

To leave BIOS without saving any changes, press the Esc key or look for an Exit option in the menu. Most BIOS screens will ask "Save changes and exit?" — select No if you have not intentionally changed anything. Your computer will restart normally and load Windows as usual.

If you did make changes intentionally, select Yes or press F10 to save and exit. Your computer will restart with the new settings in place. If your computer does not start after saving changes, you can usually reset BIOS to defaults by holding down a specific key during startup (often F9 or Delete) or by removing the CMOS battery inside the computer — but this is a last resort and should only be done if you are comfortable opening your machine.

Frequently Asked Questions

What if I press the key but nothing happens?

You may have missed the timing window — the startup screen appears for only a few seconds. Restart your computer and try again, pressing the key more frequently. If you have tried five times and nothing appears, try a different key (F2 and Delete are most common), or use the Windows restart method instead.

Can I damage my computer by entering BIOS?

straightforward opening BIOS and looking at settings causes no damage. Changing settings can cause problems — for example, disabling a hard drive or changing boot order can prevent startup — but you can always reset to defaults. Do not change anything unless you know what it controls.

Why is my startup screen so fast I cannot read it?

Modern computers with solid-state drives boot very quickly. Use the Windows restart method (Shift+Restart, then Troubleshoot, then UEFI Firmware Settings) instead of trying to time a key press. This method works reliably on Windows 10 and 11.

Do I need a password to enter BIOS?

Most computers do not have a BIOS password set by default. If one is set, you will see a password prompt when you try to enter BIOS. If you do not know the password, you may need to contact the computer's owner or manufacturer, or remove the CMOS battery inside the machine to reset it.

What is the difference between BIOS and UEFI?

UEFI is the newer version of BIOS and works the same way from a user's perspective — you restart, press a key, and see a menu of settings. The main difference is that UEFI supports larger hard drives and has a graphical interface on some machines, while older BIOS is text-only. The process for entering either one is identical.