What exactly are you trying to do when the message appears?
More details are needed.
Thank you for responding to query.
I am trying to view programmes.
I can retrieve all channels available on my ROKU . However I can not see the programme as I get purple screen with HDCP unauthorised content message. I can hear the program. For example, click on BBC News, ITV, Damand 5 etc I can hear the programme but there is no picture.
I have tried all solutions on ROKU website. Hope you can help.
Many thanks