W10 prevents Linux access

Question

I am a Linux user - very basic techie..Been using Linux for 16 years. Installed Linux alongside Windows 10 on a new Acer Aspire c24-865.
PC boots straight in Windows ....
Since I cannot access UEFI in this BIOS (version R02-A0),
none of the solutions I have seen so far seem to apply ..
Thanks for your help!!! I tried all other solutions such as this:
Windows 10 Boots Automatically After Installing Ubuntu

Answer 1

I had same problem on my Aspire C24-865. Tried boot-repair, with same results although noticed that the error report said 'try the following in Win10'

1. Run Command.com as Admin.

2. Enter following instruction:

   bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi
   

3. Re-start computer.

That worked for me. Grub menu now loads to give the expected OS choices.

Answer 2

Accessing UEFI from Windows 10 on an Acer can be a bit convoluted. If the links provided by my peers in their comments don't resolve your issue, and you can't access the UEFI settings by hitting F2 or Del when the logo screen appears at power on, boot into Windows 10 and then

• Click the Start Start menu and select Settings..
• Click Update & security.
• Click Update and recovery.
• Select Recovery from the left column, then
• Click Restart now.
• Once boot menu appears, select Troubleshoot.
• In Troubleshoot menu, select Advanced options.
• In Advanced options menu, click UEFI Firmware Settings.
• Click Restart. The system will restart and enter UEFI (BIOS).

Source: https://us.answers.acer.com/app/answers/detail/a_id/27103/