Last week I bought two HP 250 G5 laptops as a gift for a couple of family members, then proceeded to install Linux Mint 18 Cinnamon alongside Windows 10 on each. Those HP models are not top of the line, but with Intel Core i3 processors and 8 GB of RAM, they are not shabby computing machines.
To accomplish the objective of dual-booting Linux Mint 18 Cinnamon and Windows 10 on the machines, I had to first disable Secure Boot (or more accurately, Restricted Boot). This article details the steps involved in that simple operation.
To disable Secure Boot, you first need to access the UEFI (BIOS) setup utility. On an HP 250 G5 laptop, that’s easier if you first bring up the boot menu by pressing the ESC key (several times) as the unit boots up. The entries on that menu and the F-keys to press to access each, are:
F1 System Information
F2 System Diagnostics
F9 Boot Device Options
F10 Bios Setup
F11 System Recovery
So when at the boot menu, the relevant entry is F10 Bios Setup, which means you need to press the F10 key to access the UEFI setup utility. Note that when at the computer’s boot menu, you don’t have to press the Fn key before pressing any of the function keys.
At the UEFI setup screen, use the right-arrow key to navigate to System Configuration, then use the down-arrow key to navigate to Boot Options. Press ENTER/Return when Boot Options is selected. Scroll down to Secure Boot (it’s under the UEFI Boot Options). By default, Secure Boot is enabled, so press F5 to disable it. Follow that by pressing the F10 key, then Yes to the prompt to save and exit.
As the system reboots, you’ll be presented with a screen that contains a 4-digit number that you need to input into the prompt for the change you made to the Secure Boot settings to be accepted. With Secure Boot disabled, you’ll be able to install 3rd-party software and drivers that cannot be verified if Secure Boot was enabled.