Your SSD or HDD might be disconnected, loose, or failing.
A recent Windows update or a dead CMOS battery may have reset your BIOS settings, changing the boot order or disabling necessary compatibility modes. Step 1: Quick Escape (The "Exit" Command) efi shell version 260 512 2021
If your computer is stuck on a black screen displaying it generally means your system's firmware (UEFI) cannot find a valid bootable operating system on your storage drive. Instead of loading Windows, the computer has dropped you into a command-line environment used for low-level system management. Why You Are Seeing This Screen This screen typically appears for one of three reasons: Your SSD or HDD might be disconnected, loose, or failing
If the exit command fails, you need to tell your computer where to find Windows. efi shell version 260 512 2021