Security Windows

How to Disable UEFI Secure Boot to Dual Boot Any System

Gavin Phillips Updated 19-07-2019

Have you ever tried to install a second operating system alongside Windows? Depending on the OS, you might have encountered the UEFI Secure Boot feature.


If Secure Boot doesn’t recognize the code you’re trying to install, it will stop you. Secure Boot is handy for preventing malicious code running on your system. But it also stops you booting some legitimate operating systems, like Kali Linux, Android x86, or TAILS.

But there is a way around it. This short guide will show you how to disable UEFI Secure Boot to let you dual boot any operating system you like.

What Is UEFI Secure Boot?

Let’s take a second to consider precisely how Secure Boot keeps your system safe.

Secure Boot is a feature of the Unified Extensible Firmware Interface (UEFI). UEFI itself is the replacement for the BIOS interface found on many devices. UEFI is a more advanced firmware interface with many more customization and technical options.

Computer Security, UEFI, BIOS, Dual Boot


Secure Boot is something of a security gate. It analyzes code before you execute it on your system. If the code has a valid digital signature, Secure Boot lets it through the gate. If the code has an unrecognized digital signature, Secure Boot blocks it from running, and the system will require a restart.

At times, code that you know is safe, and comes from a reliable source, might not have a digital signature in the Secure Boot database.

For example, you can download numerous Linux distributions directly from their developer site, even verifying the distribution checksum to check for tampering. But even with that confirmation, Secure Boot will still reject some operating systems and other types of code (such as drivers and hardware).

How to Disable Secure Boot

Now, I don’t advise disabling Secure Boot lightly. It really does keep you safe (check out the Secure Boot vs. NotPetya Ransomware video below, for example), especially from some of the nastier malware variants like rootkits and bootkits (others would contend it was the security measure to stop Windows pirating). That said, sometimes it gets in the way.


Please note that turning Secure Boot back on may require a BIOS reset. This does not cause your system to lose any data. It does, however, remove any custom BIOS settings. Moreover, there are some examples where users are permanently no longer able to turn on Secure Boot, so please bear that in mind.

Okay, here’s what you do:

  1. Turn your computer off. Then, turn it back on and press the BIOS entry key during the boot process. This varies between hardware types How to Enter the BIOS on Windows 10 (And Older Versions) To get into the BIOS, you usually press a specific key at the right time. Here's how to enter the BIOS on Windows 10. Read More , but is generally F1, F2, F12, Esc, or Del; Windows users can hold Shift while selecting Restart to enter the Advanced Boot Menu. Then select Troubleshoot > Advanced Options: UEFI Firmware Settings.
  2. Find the Secure Boot option. If possible, set it to Disabled. It is usually found in the Security tab, Boot tab, or Authentication tab.
  3. Save and Exit. Your system will reboot.

You have successfully disabled Secure Boot. Feel free you grab your nearest previously unbootable USB drive and finally explore the operating system. Our list of the best Linux distributions is a great place to start The Best Linux Operating Distros The best Linux distros are hard to find. Unless you read our list of the best Linux operating systems for gaming, Raspberry Pi, and more. Read More !

How to Re-Enable Secure Boot

Of course, you might want to turn Secure Boot back on. After all, it does help protect against malware and other unauthorized code. If you directly install an unsigned operating system, you’ll need to remove all traces before attempting to turn Secure Boot back on. Otherwise, the process will fail.

  1. Uninstall any unsigned operating systems or hardware installed when Secure Boot was disabled.
  2. Turn your computer off. Then, turn it back on and press the BIOS entry key during the boot process, as above.
  3. Find the Secure Boot option and set it to Enabled.
  4. If Secure Boot doesn’t enable, try to Reset your BIOS to factory settings. Once you restore factory settings, attempt to enable Secure Boot again.
  5. Save and Exit. Your system will reboot.
  6. In the event the system fails to boot, disable Secure Boot again.

Troubleshooting Secure Boot Enable Failure

There are a few small fixes we can try to get your system booting with Secure Boot enabled.

Computer Security, UEFI, BIOS, Dual Boot

Trusted Boot

Trusted Boot picks up where Secure Boot stops, but really only applies to the Windows 10 digital signature. Once UEFI Secure Boot passes the baton, Trusted Boot verifies every other aspect of Windows 7 Windows 10 Security Features & How to Use Them Windows 10 is all about security. Microsoft recently instructed its partners that in sales, Windows 10's security features should be the primary focus. How does Windows 10 live up to this promise? Let's find out! Read More , including drivers, startup files, and more.

Much like Secure Boot, if Trusted Boot finds a corrupted or malicious component, it refuses to load. However, unlike Secure Boot, Trusted Boot can at times automatically repair the issue at hand, depending on the severity. The below image explains a little more about where Secure Boot and Trusted Boot fit together in the Windows boot process.


Computer Security, UEFI, BIOS, Dual Boot

Should You Turn Off Secure Boot?

Disabling Secure Boot is somewhat risky. Depending on who you ask, you’re potentially putting your system security at risk.

Secure Boot is arguably more useful than ever at the current time. Bootloader attacking ransomware is very real. Rootkits and other particularly nasty malware variants are also out in the wild. Secure Boot provides UEFI systems What Is UEFI And How Does It Keep You More Secure? If you've booted your PC recently you might have noticed the acronym "UEFI" instead of BIOS. But what is UEFI? Read More with an extra level of system validation to give you peace of mind.

Related topics: BIOS, Computer Security, Dual Boot, Troubleshooting, UEFI.

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  1. Paraplegic Racehorse
    July 21, 2019 at 6:04 am

    You could go through all this trouble, it you could just too out the BIOS/EUFI system and replace it entirely. See libreboot and coreboot projects.

  2. John
    April 20, 2018 at 3:27 pm

    If you run Windows at all you will want Secure Boot enabled. If you only run Linux then for compatibility sake I would disable it so drivers can install correctly. Although Linux such as Ubuntu fully support Secure Boot some other less popular Linux distros do not. Linus Torvalds was not so supportive of Secure Boot at first but later relented it was useful if security was important. Although I probably think his statement didn't reflect what he did and probably does not run Secure Boot.

  3. Dj
    April 1, 2018 at 3:18 am

    Sigh. Of course the powers that be completely hijacked the secure boot implementation turning it into "authorized boot", and of course they decide what is authorized. The end-user feature we need is *we* re-sign the boot record after *we* install an OS we trust.

  4. Ian
    March 31, 2018 at 6:13 pm

    Thank you for not advocating people disable UEFI (the title had me worried). Secure Boot is just one feature of UEFI and isn't a requirement. Additionally, almost every modern Linux OS has full support for UEFI and leaving it enabled can actually make dual booting easier.

    • Graeme
      April 1, 2018 at 10:40 am

      Yeah, I thought the same, title for this article is inaccurate and misleading.

    • Gavin Phillips
      April 1, 2018 at 9:11 pm

      Thanks for the heads up, we've changed the title. "Secure Boot" seems to have slipped through the net somehow!