Hi @Wes, I tried all these things unfortunatly with no success.
It is not the AVG firewall or virus scanner, it is the ransom ware protection that cause the problem.
And it started two weeks ago. Before AVG and Roon coexists without any problem.
In other threats you can see that other users have the same problem with the ransom ware protection in Avest, starting roughly at the same time.