Learning how to start PC in BIOS is a fundamental skill for any computer user. Accessing your computer’s BIOS requires pressing a specific key during the initial startup sequence. This guide will walk you through every method, key, and troubleshooting step you need.
The BIOS, or Basic Input/Output System, is low-level software that initializes your hardware before your operating system loads. You enter it to change boot order, enable hardware components, or troubleshoot startup problems.
It might seem technical, but the process is straightforward once you know the steps. We will cover all major brands and common issues.
How To Start Pc In Bios
The universal method to enter BIOS is to press a designated key immediately after you power on your computer. The timing is critical; you must press the key before the Windows or other OS logo appears.
Here is the standard procedure that works for most desktop and laptop computers. Follow these steps carefully.
- Save any open work and completely shut down your PC. Do not restart from within Windows; perform a full shutdown.
- Press your computer’s power button to turn it on.
- Immediately begin repeatedly tapping the BIOS key for your brand. Do not hold the key down; tap it quickly and consistently.
- This should bring you to the BIOS setup utility interface. If you see the operating system loading, you were too late and need to restart and try again.
Common BIOS Keys By Manufacturer
The key you need to press depends on your computer’s motherboard or brand. This list covers the most frequent keys for major manufacturers.
- Dell: F2 or F12
- HP: F10 or Esc
- Lenovo (Desktop): F1 or F2
- Lenovo (Laptop): F2 or Fn + F2
- ASUS: F2 or Delete
- Acer: F2 or Delete
- MSI: Delete
- Gigabyte/Aorus: Delete
- ASRock: F2 or Delete
- Samsung: F2
- Sony: F2 or Assist button
- Toshiba: F2
- Microsoft Surface: Hold Volume Up button while pressing power.
If you are unsure of your brand, start by spamming the F2 and Delete keys during startup, as these are the two most common. The correct key is often briefly displayed on the very first splash screen.
Entering BIOS On Windows 10 And Windows 11
Modern versions of Windows use a feature called Fast Startup, which can make accessing BIOS difficult. This feature puts the computer into a hybrid hibernation state instead of a full shutdown, causing it to boot too quickly to catch the key press.
If the standard key-press method fails, use Windows’ advanced startup options. This is a reliable workaround.
- Click the Windows Start menu and open the Settings app (the gear icon).
- Navigate to “Update & Security” (Windows 10) or “System” then “Recovery” (Windows 11).
- Under “Advanced startup,” click the “Restart now” button.
- Your PC will reboot into a blue menu. Choose “Troubleshoot.”
- Next, select “Advanced options.”
- Finally, click “UEFI Firmware Settings” and then “Restart.” Your computer will reboot directly into the BIOS/UEFI.
You can also hold the Shift key while clicking “Restart” from the Windows power menu. This will also take you to the advanced startup blue menu where you can find the UEFI Firmware Settings option.
Disabling Fast Startup In Windows
To make the traditional key-press method work consistently, you can disable Fast Startup. This ensures your PC performs a complete shutdown every time.
- Open the Windows Control Panel (search for it in the Start menu).
- Select “Hardware and Sound.”
- Click “Power Options.”
- On the left sidebar, click “Choose what the power buttons do.”
- Click “Change settings that are currently unavailable.”
- Under “Shutdown settings,” uncheck the box for “Turn on fast startup (recommended).”
- Click “Save changes.”
After this, a full shutdown will allow you to use the BIOS key normally. Remember, this setting is separate from the Fast Boot option inside the BIOS itself.
Accessing BIOS On Apple Mac Computers
Macs use a different system called EFI or Startup Manager, but the function is similar. The process depends on whether your Mac uses an Intel processor or Apple’s own M-series chips.
For Intel-based Macs, you can access startup options by holding the Option (Alt) key immediately after pressing the power button. This shows bootable drives. For firmware utility, you need to use Command + R or other combinations during startup for Recovery.
For Macs with Apple Silicon (M1, M2, M3, etc.), the process is different. You must shut down the Mac completely. Then, press and hold the power button until you see the startup options screen. Click the gear icon labeled “Options” and then click “Continue” to enter Recovery, which has similar tools.
Understanding BIOS And UEFI
You might hear the terms BIOS and UEFI used interchangeably. UEFI (Unified Extensible Firmware Interface) is the modern replacement for the legacy BIOS system. It offers a more user-friendly interface, often with mouse support, and supports larger hard drives and faster boot times.
Most computers sold in the last decade use UEFI, but it is often still colloquially called “the BIOS.” The methods for entering it remain largely the same, though the key is sometimes labeled as “Setup” or “UEFI Settings” on the boot screen.
Navigating The BIOS/UEFI Interface
Once inside, you will need to navigate using your keyboard. Legacy BIOS interfaces typically use the arrow keys, Enter, and Escape. UEFI interfaces often allow mouse navigation.
Common keys for navigation include:
- Arrow Keys: Move between menus and options.
- Enter: Select a menu or option.
- Esc: Go back or exit.
- F10: Save changes and exit (very common).
- F9: Often loads default settings.
- Page Up/Page Down or +/-: Change values for settings.
Be cautious when making changes. Only adjust settings you understand. Incorrect settings can prevent your system from booting. If you get lost, you can usually exit without saving by pressing Esc and selecting “Discard Changes.”
Common BIOS Settings And Their Functions
Knowing what common settings do can help you use the BIOS effectively. Here are some tabs or menus you will likely encounter.
Boot Order Or Boot Priority
This is the most frequent reason for entering BIOS. It controls the sequence of devices your PC checks for an operating system. You would change this to boot from a USB drive to install a new OS or run a diagnostic tool.
Enabling Or Disabling Hardware
You can enable/disable onboard components like audio, network cards, or USB ports. This is useful for troubleshooting hardware conflicts.
Virtualization Technology (VT-x Or AMD-V)
This setting must be enabled if you want to run virtual machines using software like VMware or VirtualBox. It’s often found under a “CPU Configuration” or “Advanced” menu.
Secure Boot
A UEFI security feature that ensures only trusted software boots the OS. It can sometimes prevent booting from older installation media and may need to be temporarily disabled.
TPM (Trusted Platform Module)
A security chip required for features like Windows 11. Its enable/disable switch is located in the BIOS, often under “Security” or “Advanced” settings.
Fan Control And Monitoring
Many BIOSes allow you to monitor system temperatures and adjust fan speed curves to balance noise and cooling. This is crucial for system health.
Troubleshooting BIOS Access Problems
Sometimes, pressing the correct key does not work. Here are solutions to common problems that prevent entering the BIOS setup.
Keyboard Not Responding On Startup
Some systems, especially laptops, may not initialize USB ports early enough for a USB keyboard to work. Try these fixes:
- Use a keyboard connected via the older PS/2 port (with an adapter if necessary).
- Connect your USB keyboard to a USB 2.0 port (often black) instead of a blue USB 3.0 port.
- Check your BIOS manual for a setting like “USB Legacy Support” or “Fast Boot” that might need enabling or disabling.
Fast Boot Is Enabled In BIOS
An internal BIOS setting called “Fast Boot” can shorten the window for pressing the key to almost zero. To get around this, you may need to clear the CMOS.
Clearing CMOS resets the BIOS to factory defaults, which will disable Fast Boot. You can do this by either:
- Using the CMOS clear jumper on your motherboard (consult your manual).
- Removing the small, round CMOS battery from the motherboard for a few minutes with the PC unplugged.
Computer Boots Too Quickly
With fast SSDs and optimized firmware, the boot process can be lightning fast. The Windows advanced startup method described earlier is the best solution. Alternatively, try spamming the BIOS key the moment you press the physical power button, even before the screen turns on.
Advanced Methods For BIOS Access
For specific situations or system configurations, there are other ways to reach the BIOS menu.
Using Windows Recovery Environment (WinRE)
If Windows fails to boot twice in a row, it should automatically launch into the Windows Recovery Environment. From there, you can navigate to “Advanced options” > “Troubleshoot” > “UEFI Firmware Settings” as previously outlined.
Using Command Prompt Or PowerShell
You can trigger an advanced startup reboot from the command line. This is useful for remote management or scripting.
- Open Command Prompt or PowerShell as an Administrator.
- Type the command:
shutdown /r /fw - Press Enter. Your system will reboot directly into the UEFI firmware settings.
Note that this command requires a system with UEFI and may not work on older legacy BIOS systems.
Accessing BIOS On A Dedicated GPU System
Some systems with dedicated graphics cards may not show the initial POST screen on your monitor. The GPU might not activate until later in the boot process. Try connecting your monitor to the motherboard’s integrated video output (if available) to see the startup screen and prompts.
Safety And Precautions In BIOS
The BIOS is a powerful tool. Making incorrect changes can render your system unbootable. Always follow these safety guidelines.
First, do not change settings randomly. If you are unsure about an option, look it up or leave it at its default. Second, if you are updating the BIOS (flashing), ensure you use the correct file from your manufacturer’s website and do not interrupt power during the process. A failed update can permanently damage the motherboard.
Finally, before making major changes, some BIOSes offer a “Save Profile” feature. You can save your current settings to a file on a USB drive. This provides an easy way to restore them if something goes wrong.
Exiting The BIOS Properly
When you are finished, you have two main options:
- Save Changes and Exit: This applies all the changes you made and restarts the computer. Usually done by pressing F10.
- Discard Changes and Exit: This exits without saving any new settings. Use this if you explored but did not intend to change anything. Often done by pressing Esc.
Always choose one of these options. Do not just hit the reset or power button, as this could corrupt settings in rare cases.
Frequently Asked Questions
What Is The Most Common Key To Enter BIOS?
The Delete (Del) key and the F2 key are the two most common keys across all desktop and laptop brands. If you don’t know your brand, start by spamming these two keys during startup.
Can I Access BIOS From Within Windows?
You cannot open the BIOS interface while Windows is running, but you can use the Windows advanced startup options to schedule a reboot directly into the BIOS/UEFI settings, as detailed in the Windows 10/11 section above.
Why Can’t I Enter BIOS On My New Laptop?
Many new laptops have extremely fast boot times due to Fast Startup and SSD drives. The window to press the key is very short. Use the Windows advanced startup method, or try shutting down completely, then opening the lid and immediately beginning to tap the BIOS key repeatedly before you even see any screen light up.
What Is The Difference Between BIOS Setup And Boot Menu?
The BIOS Setup (entered with F2, Del, etc.) is the full configuration utility. The Boot Menu (often F12, F11, or Esc) is a temporary menu that lets you select a device to boot from once without changing the permanent boot order in the BIOS.
How Do I Reset BIOS To Default Settings?
Inside the BIOS, look for an option like “Load Optimized Defaults,” “Load Setup Defaults,” or “Reset to Factory Settings.” This is usually on the main or exit page. Selecting this will revert all settings to a safe, standard state, which can solve many configuration problems.