Having same issue on Win7. Just re-installed again today. ver 5.75 installed and worked fine. Closed and wont restart. I see the process in the tray and in the Task Manager Processes, but not Task Manager Applications. I do not have TrendMicro. I do have Norton 360 ( rebranded from Norton Internet Security). Most settings at default. I can disable for 15 minutes and it will still not start. I also have NordVpn but it is not running. I also have Malawarbytes antimalware premium. I also have Acronis True Image2019, which has resident Acronis Active Protection..