Kubuntu won't install/boot HP Pavilion Laptop

I am trying to install kubuntu so that I can dual boot with that and Windows. Im using Kubuntu 18.04.4 LTS. I've already flashed the usb and partitioned space on the hard drive. I had gotten to the installation menu and after selecting which installation I wanted, (normal installation) I got an error that ubi-partman had crashed with exit code 141. I tried retrying but that didnt work so I had to reboot. The problem kept happening so I booted into windows. I wiped the usb and re-flashed the iso onto it. This time, the computer brought me to a black screen with an error message. I managed to take a picture before the computer shut off. It said:

Failed to open \EFI\BOOT\mmx64.efi - Not Found
Failed to Load Image \EFI\BOOT\mmx64.efi: Not Found
Failed to Start MokManager: Not Found
Something has gone seriously wrong: import_mok_state() failed : Not Found

I don't know what any of this means and I cant seem to fix it. I've tried enabling Legacy Support in the BIOS settings as well as turning off Secure Boot. I've also tried resetting my BIOS settings to the default values and that didn't help. Does anyone know what Im doing wrong and how to fix it?

2 Answers

This issue's been fixed in a few instances by modifying the boot disk. In \EFI\BOOT\ make a duplicate of grubx64.efi and rename it mmx64.efi then try and run the install. Altering the boot disk can be a bit fiddly but there's been a fair bit of success with this fix on dual boot systems. Let me know if that solves it for you, if not creating a UEFI-only boot media has also resolved this in a lot of cases.

I could boot into the live environment after redownloading the iso and reflashing it to the usb, then turning on legacy support