Symptoms
You try to boot Gen2 Hyper-V VM with Acronis Bootable Media
Media fails to boot with the following message:
The image's hash and certificate are not allowed (DB)
No UEFI-compatible file system was found.
Cause
Secure Boot is enabled on the VM. Secure Boot prevents boot from a Linux bootloader in the ISO file (the Linux bootloader neither signed nor certified by Microsoft).
This issue is not specific to Acronis Bootable Media.
Solution
Temporarily disable Secure Boot in Settings -> Security -> Enable Secure Boot.
Alternatively, the "Secure Boot" selection can be changed to "Microsoft UEFI Certificate Authority." This selection should work for the majority of Linux distributions according to Microsoft.