Yes, I have Hyper-V enabled, although I think it was not used by Docker Desktop, which used the WSL 2 backend.
It worth to mention that I run Docker Desktop as a standard, non administrative user (I am a member of the docker-users group).
Finally, it worked with the previous version, 3.3.3.
What is strange is that both installers reported success, but they both:
- failed to create a Docker Desktop icon on the desktop (option for this was enabled during the installation) (and they also)
- did not display the message with the need of a reboot (for version 3.3.3) or log-off (for 3.4.0).