Norton Internet Security windows fading

I would be fully satisfied with Norton Antivirus if not for one problem. After one of the updates, the application interface of Norton is fading. Every window I open begins to fade as soon as I move mouse over it. The window only goes back to normal after I remove and return the focus to the window, but as soon as I get back to the window, starts fading again. When I clicked on "Get support" Norton said fixed some problems and apparently recognized this problem, because in some windows it does not happen anymore (actually happens, but it seems that internally, the application performs constant refreshs) . In another window, the problem remains, however fading occurs more slowly.