Cannot boot memtest86?

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   I found the trick is to select "UEFI: sandisk" from the boot menu. I was able to boot memtest86 once using this. However, the boot menu items changes frequently. It always shows a list of hard drives, followed by:

USB: sandisk (may appear 0 or 1 time)
UEFI: sandisk (may appear 0, 1 or 3 times)

Obviously if the UEFI entry doesn't show up I cannot select it to boot. So what causes these choices to sometimes show up and sometimes not show up?

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oldrock Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 Feb 2021 Status: Offline Points: 24	Post Options Post Reply Quote oldrock Report Post Thanks(0) Quote Reply Topic: Cannot boot memtest86? Posted: 05 Feb 2021 at 3:20am
	I found the trick is to select "UEFI: sandisk" from the boot menu. I was able to boot memtest86 once using this. However, the boot menu items changes frequently. It always shows a list of hard drives, followed by: USB: sandisk (may appear 0 or 1 time) UEFI: sandisk (may appear 0, 1 or 3 times) Obviously if the UEFI entry doesn't show up I cannot select it to boot. So what causes these choices to sometimes show up and sometimes not show up?

oldrock Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 Feb 2021 Status: Offline Points: 24	Post Options Post Reply Quote oldrock Report Post Thanks(0) Quote Reply Posted: 04 Feb 2021 at 9:22am
	I can boot up windows 10 install from an USB drive by selecting "USB sandisk" in the boot menu. I then replace the windows 10 usb drive with a memtest86 usb drive and try to boot the same way. I ended up booting windows 10 from a hard drive. I read I need to enable UEFI. But if it boots up windows 10 install disk, doesn't that mean UEFI is enabled? My mobo is asrock z97 killer LGA 1150. Would it work?