If your old C drive goes back a few years they might be there from when V4 needed to be in the main runtime which is not required now,  

Actually that statement is incorrect.  V4 base and all her morph packages should be in the same runtime regardless whether they reside in the main runtime or external.  The main runtime concept arose because Microsoft Vista and Win 7 did not exist at the time to complicate security issues.  Also, it was convenient to instruct new users to place files into an established location rather than detailing how to create external runtimes.

Your right of course, at my age you do tend to mis-remeber things.  My apologies if I mislead anyone or caused any inconvenience.

 

 

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.