Have generally run Norton 360 on Windows 10 without difficulty. Recently however, very shortly after opening Norton, the application freezes and an error message appears saying "Norton is not responding". This now happens every time and basically renders Norton unusable. The only option is then to close the application. I have: 1. installed & reinstalled; 2. eliminated any other security apps; 3. checked that I am running the latest version of Norton; 4. checked that Microsoft is up to date; 5. had two lengthy on-line sessions with Norton support who performed variations of 1-4 before conceding they had no idea and no solution - the best they were able to offer was a promise to "raise the problem with senior team members". As an aside, these interactions were time-consuming and deeply frustrating, the more so since the parting advice was to initiate an entirely new on-line support session and re-state the problem afresh with a new consultant. No attempt was made to learn from the experience to date which had failed to produce a fix or in any way "ease the customer experience". Any clever people out there with any better ideas? I should be very grateful.