How to Determine Bios Eufi Boot Order

This guide teaches you how to determine BIOS UEFI boot order to control which device your computer starts from. You’ll learn to access UEFI settings, identify boot devices, and troubleshoot common issues.

Key Takeaways

• Accessing UEFI Firmware: Use keyboard shortcuts during startup (F2, F10, DEL, ESC) or Windows Recovery to enter UEFI settings.
• Understanding Boot Order: The boot order determines which storage device the system checks first when starting up—critical for OS loading or installing new systems.
• Identifying Boot Entries: Recognize entries like “Windows Boot Manager,” USB drives, or network boot options to understand what each option does.
• Secure Boot & Compatibility: Ensure Secure Boot is configured correctly, especially when dual-booting or using non-Windows operating systems.
• Troubleshooting Boot Failures: If your PC won’t boot, check boot order, disable fast boot, and verify hardware connections.
• UEFI vs Legacy Mode: Know the difference—UEFI offers faster boot times, better security, and support for large drives over 2TB.
• Saving Changes Safely: Always save and exit properly to avoid losing configuration or causing boot loops.

How to Determine BIOS UEFI Boot Order: A Complete Guide

Ever turned on your computer and wondered why it’s not starting the way you expected? Maybe you inserted a USB drive to install a new operating system, but your PC ignored it and booted straight into Windows. Or perhaps your laptop keeps trying to boot from a network or CD drive instead of your hard drive. These issues often come down to one thing: the BIOS UEFI boot order.

In this comprehensive guide, you’ll learn exactly how to determine BIOS UEFI boot order—what it means, why it matters, and how to check and change it safely. Whether you’re installing a new OS, troubleshooting startup problems, or just curious about how your computer starts up, mastering the boot order is a fundamental skill every computer user should have.

We’ll walk you through accessing your UEFI firmware settings, identifying boot devices, adjusting the boot sequence, and troubleshooting common issues—all in simple, easy-to-follow steps. No technical jargon overload. Just clear, practical instructions that work on most modern PCs and laptops.

What Is UEFI and Why Does Boot Order Matter?

Before diving into the steps, let’s clarify what UEFI is and why the boot order is so important.

UEFI (Unified Extensible Firmware Interface) is the modern replacement for the older BIOS (Basic Input/Output System). It’s the low-level software that runs when you power on your computer, initializing hardware and loading the operating system. Unlike the old BIOS, UEFI supports faster boot times, larger hard drives (over 2TB), secure boot features, and a more user-friendly interface.

The boot order is a list of devices (like hard drives, SSDs, USB drives, optical drives, or network adapters) that your computer checks in sequence when it starts up. The system tries to boot from the first device in the list. If it doesn’t find a valid operating system there, it moves to the next one, and so on.

For example, if your boot order is set to USB first, then SSD, your computer will always check the USB drive first—even if you don’t have one plugged in. This can cause delays or prevent your system from starting if the USB drive isn’t bootable.

Knowing how to determine and adjust the boot order gives you control over:

• Which operating system loads (especially useful for dual-boot setups)
• Installing new operating systems from USB or DVD
• Recovering from system crashes using recovery media
• Preventing accidental booting from unauthorized devices

How to Access UEFI Firmware Settings

The first step in determining your boot order is getting into the UEFI firmware interface. This is where all the low-level settings live, including the boot sequence.

There are several ways to access UEFI, depending on your computer’s manufacturer and operating system. Here are the most common methods:

Method 1: Use a Keyboard Shortcut During Startup

This is the classic way—pressing a specific key right after turning on your computer. The exact key varies by manufacturer, but here are the most common ones:

• Dell: F2 or F12 (F12 opens the boot menu directly)
• HP: F10 or ESC (then select BIOS Setup)
• Lenovo: F1 or F2 (on ThinkPads, you may need to press Enter first, then F1)
• ASUS: F2 or DEL
• Acer: F2 or DEL
• MSI: DEL
• Apple (Boot Camp): Hold Option (Alt) key during startup to see boot options

Tip: Start tapping the key immediately after pressing the power button. You usually have only a few seconds before the operating system starts loading. If you miss it, restart and try again.

Method 2: Use Windows Settings (Windows 10 & 11)

If your computer is already running Windows, you can access UEFI without guessing the right key. Here’s how:

1. Click the Start button and select Settings (gear icon).
2. Go to Update & Security > Recovery.
3. Under Advanced startup, click Restart now.
4. Your PC will restart and show a blue menu. Select Troubleshoot > Advanced options > UEFI Firmware Settings.
5. Click Restart to enter UEFI.

This method is reliable and avoids the timing issue of pressing keys during boot.

Method 3: Use the Shift + Restart Trick

Another Windows-friendly approach:

1. Click the Start button, then click the Power icon.
2. Hold down the Shift key and click Restart.
3. Your PC will reboot into the recovery environment. Follow the same path: Troubleshoot > Advanced options > UEFI Firmware Settings.

This is especially useful if you’re troubleshooting and can’t afford to keep restarting blindly.

Method 4: Use Command Prompt or PowerShell

For advanced users, you can trigger a UEFI restart from the command line:

1. Open Command Prompt or PowerShell as Administrator.
2. Type the following command and press Enter:
   shutdown /r /fw
3. Your computer will restart directly into UEFI firmware.

This is a quick and clean method if you’re comfortable with command-line tools.

Navigating the UEFI Interface

Once you’re in UEFI, the interface may look different depending on your manufacturer. Some use a graphical interface with tabs and icons (like ASUS or MSI), while others use a more text-based layout (like older Dell or HP systems).

Here’s what to expect:

• Main Tab: Shows system info like CPU, memory, and boot mode.
• Boot Tab: This is where you’ll find the boot order settings.
• Security Tab: Includes Secure Boot, password settings, and TPM options.
• Exit Tab: Lets you save changes and exit.

Use the arrow keys to navigate. Most UEFI interfaces support mouse input, but keyboard is more reliable.

Finding the Boot Order Settings

The boot order is usually under the Boot tab, but it might also be labeled as:

• Boot Sequence
• Boot Priority
• Boot Options
• Boot Manager

Look for a list of devices. Each entry represents a potential boot source. Common entries include:

• Windows Boot Manager: The default bootloader for Windows on UEFI systems.
• UEFI: [Device Name]: Indicates a UEFI-compatible device (e.g., UEFI: Samsung SSD, UEFI: USB Drive).
• Legacy: Older boot mode, usually for non-UEFI devices.
• Network Boot: Boots from a server over the network (PXE).

The order of these entries determines the boot sequence. The top entry is checked first.

How to Determine the Current Boot Order

Now that you’re in the UEFI interface, let’s determine the current boot order.

Step 1: Go to the Boot Tab

Use the arrow keys or mouse to navigate to the Boot tab. Press Enter or click to enter.

Step 2: Review the Boot Priority List

You should see a list of boot devices. For example:

• 1. UEFI: Samsung SSD 1TB
• 2. UEFI: USB Flash Drive (SanDisk)
• 3. Windows Boot Manager
• 4. Network Boot

This means your computer will first try to boot from the Samsung SSD. If that fails, it checks the USB drive, then Windows Boot Manager, and finally the network.

Step 3: Identify Active vs. Inactive Entries

Some entries may be grayed out or marked as “Disabled.” These won’t be used during boot. Only active entries in the list matter.

Tip: If you see multiple entries for the same device (e.g., both UEFI and Legacy versions), the UEFI one is usually preferred for modern systems.

Step 4: Check for Fast Boot or Quick Boot Settings

Some UEFI systems have a Fast Boot option that skips certain checks to speed up startup. While convenient, it can hide boot devices or prevent you from accessing UEFI.

If you’re having trouble seeing all boot options, try disabling Fast Boot temporarily. Look for it under the Boot or Advanced tab.

How to Change the Boot Order

Once you’ve determined the current boot order, you might want to change it—for example, to boot from a USB drive to install Linux or recover your system.

Step 1: Select the Boot Device to Move

Highlight the device you want to move up or down in the list. For example, if you want to boot from a USB drive first, select the USB entry.

Step 2: Use the Move Keys

Most UEFI interfaces let you change the order using keys like:

• +/- or F5/F6 to move items up or down
• Enter to confirm

Some systems have a “Move” or “Priority” button. Click it and follow the prompts.

Step 3: Reorder the List

Move your preferred device to the top. For example:

• 1. UEFI: USB Flash Drive (SanDisk)
• 2. UEFI: Samsung SSD 1TB
• 3. Windows Boot Manager

This ensures the USB drive is checked first.

Step 4: Save and Exit

After reordering, go to the Exit tab and select Save Changes and Exit (or press F10). Confirm when prompted.

Your computer will restart and attempt to boot from the new first device.

Alternative: Use the One-Time Boot Menu

If you only need to boot from a different device once (e.g., to install an OS), you don’t need to change the permanent boot order. Most systems have a boot menu that lets you choose a device for just that session.

To access it, press a key during startup—usually F12, ESC, or F8 (varies by brand). A menu will appear with all available boot devices. Select the one you want, and the system will boot from it once, then return to the normal order next time.

This is safer and avoids accidentally changing your default settings.

Understanding UEFI vs. Legacy Boot Modes

One common source of confusion is the difference between UEFI and Legacy (also called CSM or Compatibility Support Module) boot modes.

UEFI Mode:

• Modern standard, supports GPT partitioning
• Faster boot times
• Supports Secure Boot
• Required for Windows 11
• Uses “Windows Boot Manager” as the bootloader

Legacy Mode:

• Older BIOS-style booting
• Uses MBR partitioning
• Slower and less secure
• May be needed for older operating systems or hardware

When determining your boot order, make sure you’re looking at UEFI entries if your system is set to UEFI mode. Mixing UEFI and Legacy can cause boot failures.

To check your current mode:

• In Windows, open System Information (press Win + R, type msinfo32, press Enter).
• Look for BIOS Mode. It will say “UEFI” or “Legacy.”

If you’re installing a new OS, ensure your installation media is created in the correct mode (UEFI-compatible USB drives usually have “UEFI” in the boot entry).

Troubleshooting Common Boot Order Issues

Even with the right steps, things can go wrong. Here are common problems and how to fix them.

Issue 1: Computer Won’t Boot from USB Drive

Possible Causes:

• USB drive not bootable
• USB drive not formatted for UEFI
• USB port not recognized during boot
• Secure Boot blocking non-Windows OS

Solutions:

• Use tools like Rufus (Windows) or BalenaEtcher to create a UEFI-compatible bootable USB.
• Try different USB ports—some systems only recognize certain ports during boot.
• Disable Secure Boot temporarily if installing Linux or another OS.
• Ensure the USB drive appears in the UEFI boot list. If not, recreate it.

Issue 2: Boot Order Resets After Restart

Possible Causes:

• CMOS battery is dead
• UEFI settings not saved properly
• Fast Boot or Secure Boot overriding changes

Solutions:

• Replace the CMOS battery (small coin-cell battery on the motherboard).
• Always use “Save and Exit” instead of just powering off.
• Disable Fast Boot and check for “Restore Defaults” options that might reset settings.

Issue 3: Missing Boot Devices in UEFI

Possible Causes:

• Drive not connected properly
• Drive not initialized or partitioned
• UEFI not detecting NVMe or SATA drives

Solutions:

• Power off, open the case, and reseat the drive cables.
• Check if the drive appears in the UEFI system information.
• Update UEFI firmware (BIOS update) from the manufacturer’s website.

Issue 4: “No Bootable Device” Error

Possible Causes:

• Boot order incorrect
• Operating system corrupted
• Drive failure

Solutions:

• Enter UEFI and verify the correct drive is first in the boot order.
• Use recovery media to repair the OS.
• Test the drive with diagnostic tools or try it in another computer.

Best Practices for Managing Boot Order

To avoid frustration and keep your system running smoothly, follow these best practices:

• Keep the OS drive first: Unless you’re installing or recovering, your main SSD or HDD should be the first boot device.
• Use the one-time boot menu for temporary changes: Avoid permanently changing the boot order unless necessary.
• Label your boot devices: If you have multiple drives, name them clearly (e.g., “Linux SSD” or “Backup Drive”) to avoid confusion.
• Update UEFI firmware regularly: Manufacturers release updates that improve compatibility and security.
• Document your settings: Take a photo or note of your boot order before making changes, so you can restore it if needed.

Conclusion

Determining and managing your BIOS UEFI boot order is a powerful skill that puts you in control of your computer’s startup process. Whether you’re installing a new operating system, troubleshooting a boot failure, or simply optimizing your system, knowing how to access UEFI settings and interpret the boot sequence is essential.

In this guide, you’ve learned how to access UEFI firmware, identify boot devices, change the boot order, and troubleshoot common issues. You now understand the difference between UEFI and Legacy modes, the importance of Secure Boot, and how to use one-time boot menus for temporary changes.

Remember: small changes in the boot order can have big effects. Always proceed carefully, save your settings, and keep backups of important data. With this knowledge, you’re ready to handle almost any boot-related challenge with confidence.