The docker client must be run elevated to connect

Hi,
I run the docker client as admin, but i get this error:

PS C:\Users\xxx> docker pull mysql
Using default tag: latest
error during connect: Post http://%2F%2F.%2Fpipe%2Fdocker_engine/v1.39/images/create?fromImage=mysql&tag=latest: open //./pipe/docker_engine: Impossibile trovare il file specificato. In the default daemon configuration on Windows, the docker client must be run elevated to connect. This error may also indicate that the docker daemon is not running.

How is it possible? what can I check?
The Diagnose ID is the following:

321ECA1F-4C67-431B-8796-20BC92234C14/20190702120902

Thank you very much for the support.