I installed linux in legacy mode and I don't have an option to boot it.

[R15-0_]

I installed linux 20.2 cinnamon alongside windows 8.1 with a DVD but the computer boots windows and don't have an option to boot linux after installation was done. I set the windows bios to legacy prior to installation and I think UEFI was off. After the installation of linux the computer said that the installation was complete. Is there a certain function key I have to press at startup to load linux? I am able to see the windows bios screen by pressing ESC but with no option to run the linux installation. I am suppose to be presented with a GRUB menu at startup to choose a windows or Linux boot. I hope there is a solution so can get advice? I have an HP 15-r264dx 64 bit computer with windows 8.1. 

[WAWood]

@R15-0_ 

You should have done more research before you forced a Linux distro onto your PC.

Your PC most likely came with Windows preloaded in UEFI mode.  When you installed Linux and had to switch to Legacy mode to get it to boot, Windows will no longer boot now -- because BOTH OSs have to be installed in the same mode.

We don't provide Linux support here, so you will have to do research on how to reinstall it -- this time, in UEFI mode.

[R15-0_ · Accepted solution]

I had these options when I inserted the Linux installation disc after 5 minutes of searching the disc by the computer:

A) Start Linux mint 20.2 cinnamon

B) Start Linux mint 20.2 cinnamon 64-bit in compatibility mode

C) OEM install for manufacturers

D) Check the integrity of the medium

I changed the startup to legacy mode in bios and disabled secure boat and I also disabled fast start in power options in windows. After 5 minutes of reading the disc by the computer an installation screen for Linux was presented. After Linux was installed I was not able to restart as requested by the computer within Linux but I had to use the hard power off button. When I turned the computer on it booted to Windows with no option for Linux boot. I had to go to Windows bios and select boot device options which was (UEFI) Ubuntu in OS boot manager. I have the option of pressing the f9 function key for boot device options as an alternate to going into BIOS at startup. 

[R15-0_]

Computers manufacturers must support the Linux operating system because it seems that Windows is a Monopoly requiring a lot of money for its use. 

[R15-0_]

You should have been more considerate for HP because Linux is user friendly to your pocket as opposed to Windows. 

[WAWood]

@R15-0_ 

You can "preach" about Linux and Open Source all you want -- but in the end, computer manufacturers are in it to make money -- and developing apps and drivers for Linux costs every bit as much, if not more, as developing the same for Windows -- and given the Linux community opposition to paying for anything, that is NOT a sound business practice for the manufacturers.