I am running Windows 10 and use Google Chrome and have F-Secure looking after my downloads as that is what my broadband supplier recommends. On the installs for 11.3 and the support installation F-Secure trapped both with a warning they were unknown and could damage the system. Clicking on trust this download let them install without further issue.

I also note in another thread that it takes a while for the update to propagate through the Amazon servers so those of us that downloaded very early on may not have downloaded the same upgrade package.

 

 

I use Poser 13 on Windows 11 - For Scene set up I use a Geekcom A5 -  Ryzen 9 5900HX, with 64 gig ram and 3 TB  storage, mini PC with final rendering done on normal sized desktop using an AMD Ryzen Threadipper 1950X CPU, Corsair Hydro H100i CPU cooler, 3XS EVGA GTX 1080i SC with 11g Ram, 4 X 16gig Corsair DDR4 Ram and a Corsair RM 100 PSU .   The desktop is in a remote location with rendering done via Queue Manager which gives me a clearer desktop and quieter computer room.