How to disable Secure Boot mode on BIOS for Lenovo machines

What is Secure Boot?

Secure boot establishes a trust relationship between the UEFI BIOS and the software it eventually launches (such as bootloaders, OSes, or UEFI drivers and utilities). Once Secure Boot is enabled and configured, only software or firmware signed with approved keys is allowed to execute. Although Secure Boot can improve system security, people are concerned that Microsoft’s Secure Boot function will make installing Linux or other systems on a Windows machine difficult.

If your computer/laptop comes with Windows 10 as the in-built OS, it might as well have the "Secure  Boot" function enabled by default. And with "Secure Boot" enabled, you won’t be able to boot your computer from a CD-ROM drive or USB memory stick, Network Interface Card, etc.

To install our Evren OS, you may need to disable the Secure Boot in BIOS before plugging in a USB memory stick with the installer.

⚠️  If Secure Boot has already been disabled, skip this article to proceed with Evren OS  installation.

Please follow the steps below to disable Secure Boot in Lenovo machines.

1. Turn on the PC/laptop by pressing the power button. 

2. Press ESC, F9, F8, F10, or F12 during the initial startup screen. (Depending on the company that created your version of BIOS, a menu may appear.) Boot menu keys per manufacturer. Please navigate to the Boot menu to select the device to boot from once the BIOS screen appears.

3. Under Lenovo Utility Setup, no change is required if the Boot mode is set to EFI and Secure Boot is OFF.

4. If Secure Boot is enabled, please change its state to Disabled by navigating the Security menu and clicking Secure Boot. Then select Disabled and confirm changes by clicking F10 to save and exit.

5. Your computer will automatically reboot.