I am a Windows 11 user and I have been using linux via ubuntu dual boot. The dual boot has been working wonderfully for months, until one day it stopped working for seemingly no reason. When I boot up the computer, I do not get to choose ubuntu/windows thru grub, instead I get the following error message on my boot up screen:

```
Failed to open \EFI\ubuntu\grubx64.efi - Not Found  
Failed to load image \EFI\ubuntu\grubx64.efi:Not Found  
start_image() returned Not Found, falling back to default loader  
Failed to open \EFI\ubuntu\grubx64.efi - Not Found  
Failed to load image \EFI\ubuntu\grubx64.efi:Not Found  
start_image() returned Not Found

```

As of right now, I can access my default windows OS, but I can't access the linux portion of my computer at all. I tried a couple things that other people have been suggesting on other forums. I already went into BIOS and disabled secure boot, and I also made sure that ubuntu is at the top of the boot order. None of this has worked for me. When ubuntu is at the top of the boot order, I can't even access windows either, the computer just shows me a black screen.

I tried running the boot-repair, and I had a problem with this as well. I accessed linux with a usb, and I ran the boot-repair commands on terminal. I chose the "recommended repair" option but the repair system got stuck, showing me a message that says "Applying changes. This may require several minutes..." I left it on but hours but I was not able to complete boot repair, never getting past this message. So basically not even the boot-repair program seems to be functioning properly.

Is there any way to fix this situation? Like I said earlier, I was using windows/linux dual-boot fine for months, I just don't know why this happened, nor how to fix it. Please let me know if you need anymore information from me. Here is the BootInfo summary link that I acquired through the Boot-repair system:

<https://paste.ubuntu.com/p/fhzNxsRxgq/>