Apologies for not replying sooner, never got notification you had replied gem1919. Update on my ticket today actually which had a resolution similar to what you have said. The problem is related to “LocalServiceControl” which is downloaded/installed when you access the NVR for playback. Solution is to add exclusion for IP of NVR to the above application. Settings, Application Control,, Manage Applications Top right, search for "localservicecontrol", Right click and select "Details and Rules", then select "Exclusions". Tick/select "Do not scan all traffic" and also tick "Only for specified IP address". Add the IP address for your NVR. Save and your done.