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[–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (23 children)

The former. The memory test is an alternative OS that you can boot into (if you have uefi off in your bios settings) from most live Linux distros. Was unable to confirm if Qubes has it. See the screenshot here: https://askubuntu.com/questions/591488/how-do-i-run-memtest86/591502

Simplest is running it from a flash drive I guess.

[–]CompleteDoubterII[S] 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (0 children)

Cool, thanks. I'll do it tomorrow probably.

[–]CompleteDoubterII[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (21 children)

No matter which of the Shift keys I held, I never got a grub menu. Help?

[–][deleted] 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (1 child)

What distro and how are you running it?

[–]CompleteDoubterII[S] 2 insightful - 2 fun2 insightful - 1 fun3 insightful - 2 fun -  (0 children)

I have the Qubes (4.0.1) ISO on my USB, and I currently have Windows 10. I'm running it by turning on my computer with the USB inserted and holding shift.

[–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (18 children)

With UEFI press (perhaps several times) the Escape key to get grub menu

[–]CompleteDoubterII[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (1 child)

How do I know if I have UEFI?

[–]CompleteDoubterII[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

Never mind, I found out I have UEFI.

[–]CompleteDoubterII[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (15 children)

Well, I pressed the Escape key, but I didn't get the grub menu. Instead, I got the loading bar and the text 'Press F2 for settings', 'Press F12 for boot options' on the bottom right corner of my screen.

[–]CompleteDoubterII[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (14 children)

I've tried both of them, but I don't know how to get it to boot from my USB in either option.

[–][deleted]  (1 child)

[deleted]

    [–]CompleteDoubterII[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (11 children)

    I found out how. But when I boot from my USB, I get a red box with the text: 'Invalid signature detected. Check secure boot policy in Setup.' I don't know what to do with the secure boot policy.

    [–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (10 children)

    So are you trying to install Qubes now, or are you still trying to run memtest86? For the memtest, a different bootable Linux distro might be better. I don't know if Qubes has this memtest thing as an option you can boot into.

    I think you need to edit a bios setting to allow legacy booting or something.

    Changing UEFI mode to Legacy mode. Tap away at the esc key as soon as you press the power button to enter the Start-up Menu and then select the Bios Menu ( f10 ). Under the System Configuration tab, expand the Boot Options Menu. You need to set Secure Boot to Disabled and Legacy Devices to Enabled.

    Here's some Qubes uefi docs: https://www.qubes-os.org/doc/uefi-troubleshooting/#accessing-installer-rescue-mode-on-uefi

    In UEFI mode installer do not have boot menu, but starts directly the installation wizard. To get into Rescue mode, you need to switch to tty2 (Ctrl+Alt+F2) and then execute:....

    [–]CompleteDoubterII[S] 3 insightful - 1 fun3 insightful - 0 fun4 insightful - 1 fun -  (0 children)

    Still trying to run memtest86. Didn't you say I should boot from the flash drive to boot into memtest86? Thanks for the docs, I'll read into them sometime.

    [–]CompleteDoubterII[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (8 children)

    When I try to disable Secure Boot, I get a warning saying that my operating system may not be able to boot or may require a reinstall with this disabled. Will Windows 10 be unable to boot without it enabled? My research into Secure Boot simply says it disables booting of external hardware, and doesn't actually answer the question. My computer is a Dell one, so I doubt that warning is there for no reason. I cannot risk losing Windows 10 yet, as if I do, I will have no operating system I am able to boot on my computer, meaning I will probably lose the computer.

    So, can Windows 10 boot with Secure Boot disabled?

    [–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

    I'm not sure, but if it doesn't boot, I think you can change your BIOS settings back and be okay.

    [–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (6 children)

    I think you'll be fine. Tons of guides for how to disable it, and most or all dual booters have it disabled.

    [–]CompleteDoubterII[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (5 children)

    I just realised something: I downloaded the Linux Mint ISO in a rage. It failed the integrity check, but it's more likely to have Memtest86 on it.

    1. Will it be safe to boot into Memtest86 on that Linux Mint ISO?
    2. Will Memtest86's results be accurate?