I'm using Bitdefender, on both the desktop and Laptop. I don't know if this helps any, but my desktop crashed. Originally it was a Win 7 Pro then got the free upgrade. When I rebuilt my desktop it was from a Win 10 DVD. All seemed good when the install was finished, when I reinstalled DAZ 4.9 the problems started. DIM down loaded two versions of PostgreSQL on was a beta. Every time I restarted my PC it would it would install one and uninstall the other. Finally the installs stopped. but the errors didn't.