The fastest way to open BIOS depends on your computer's brand
You open BIOS by restarting your computer and pressing a specific key while it starts up — before Windows or macOS loads. The key you press depends on whether you have a Dell, HP, Lenovo, Asus, or another brand. Most computers give you a two-second window to catch it, so you need to know which key to press before you restart.
The most common keys are Delete, F2, F10, and F12. Some older computers use F1. If you press the wrong key, your computer will just boot normally — nothing breaks. You can restart and try again.
If you built your own computer from parts, the key depends on your motherboard manufacturer, not the case brand. Check the motherboard manual or the manufacturer's website for the exact key.
Key Takeaways
- You enter BIOS by restarting your computer and pressing a specific key during startup, usually Delete, F2, F10, or F12.
- The correct key varies by manufacturer: Dell often uses F2, HP uses F10, Lenovo uses F1 or F2, and Asus uses Delete.
- You have only a few seconds after the computer starts to press the key, so you need to know it in advance.
- If you miss the window, restart the computer and try again — pressing the wrong key causes no damage.
- On newer computers with fast startup, you may need to restart from Windows settings rather than a cold shutdown.
Find the correct key for your computer brand
The easiest way to find your key is to look at the startup screen itself. When you first turn on your computer, before any logos appear, many machines display a message like "Press F2 to enter Setup" or "Press Delete for BIOS." Watch for this message and note the key.
If you cannot see the message or it disappears too fast, check your computer's manual or the manufacturer's support website. Search for your exact model number plus "BIOS key" or "enter setup." You can usually find the model number on a sticker on the back or bottom of your computer.
Here are the most common keys by brand:
| Brand | Most Common Key | Alternative Keys |
|---|---|---|
| Dell | F2 | Delete |
| HP | F10 | Esc, then F10 |
| Lenovo | F1 or F2 | Enter (during startup screen) |
| Asus | Delete | F2 |
| Acer | Delete | F2 |
| MSI | Delete | F2 |
Restart your computer and press the key at the right moment
Turn off your computer completely. Do not use sleep mode or restart — shut it down fully. Wait a few seconds, then turn it back on.
As soon as you press the power button, start pressing your BIOS key repeatedly — about once per second. Press it many times rather than holding it down. You are aiming for the moment after the computer powers on but before the operating system starts loading.
You will know you timed it right when the BIOS screen appears. It looks like a blue or black menu with white text, very different from Windows or macOS. If your computer boots normally into Windows or macOS instead, you missed the window. Shut down and try again, pressing the key a bit earlier this time.
What to do if fast startup is blocking you
Newer Windows computers have a feature called fast startup that skips some of the normal startup process. This can make the BIOS window too short to catch. If you cannot get into BIOS by restarting normally, turn off fast startup first.
Open Windows Settings, go to System, then Power & Sleep. Click "Additional power settings" on the right side. Click "Choose what the power button does" on the left. Click "Change settings that are currently unavailable." Uncheck the box next to "Turn on fast startup" and click Save Changes.
Now shut down your computer completely and try the BIOS key again. You should have more time to catch it.
Troubleshooting if you still cannot enter BIOS
If you have tried the correct key multiple times and BIOS still will not open, try these steps in order. First, make sure you are doing a full shutdown, not a restart. Some computers behave differently depending on whether you restarted or powered off.
Second, try holding the key down instead of pressing it repeatedly. Some older computers respond better to a held key. Third, try pressing the key when ready after you hear the startup beep or see the first logo — timing varies by model.
If none of these work, your computer may have BIOS protection enabled, which prevents you from entering BIOS without a password. This is usually set by an IT department on work computers or by a previous owner on used machines. You will need to contact them or reset the BIOS using a physical jumper on the motherboard — a step that requires opening the computer case.
What you will see once BIOS opens
Once you are in BIOS, you will see a menu with options like System Information, Boot Order, Security, or Power Management. The exact layout and options depend on your computer's age and manufacturer. Do not change anything unless you have a specific reason — BIOS controls how your hardware starts up, and wrong changes can prevent your computer from booting.
To exit BIOS without saving changes, look for an option that says "Exit Without Saving" or "Discard Changes and Exit." This is usually in a menu labeled Setup, Exit, or File. If you made changes you want to keep, look for "Save and Exit" instead.
Frequently Asked Questions
Will pressing the wrong key damage my computer?
No. Pressing any key during startup straightforward boots your computer normally. Nothing is harmed. If you press the wrong BIOS key, your computer will load Windows or macOS as usual, and you can restart and try again.
Can I open BIOS from within Windows?
On newer Windows computers, yes. Open Settings, go to System, then Recovery. Click "Restart now" under Advanced Startup. When the menu appears, click "Troubleshoot," then "Advanced options," then "UEFI Firmware Settings." Your computer will restart into BIOS. This method is slower but more reliable if you cannot catch the startup window.
What if I forgot my BIOS password?
BIOS passwords are set by the computer owner or IT department. If you own the computer, you can reset it by removing the CMOS battery from the motherboard for a few minutes, but this requires opening the case. If it is a work computer, contact your IT support. If it is a used computer, contact the previous owner.
Is it safe to change settings in BIOS?
It depends on the setting. Changing boot order or enabling virtualization is usually safe. Changing power settings, overclocking, or disabling hardware can cause problems. Only change settings if you know what they do. When in doubt, exit without saving and research the setting first.
Why would I need to open BIOS?
Common reasons include updating BIOS firmware, changing the boot order to install a new operating system, enabling or disabling hardware features, or checking system information like RAM and processor type. Your computer will tell you if BIOS needs an update through Windows Update or the manufacturer's support software.