If you're running Vista, here's a possible cause for P7 / PPro to act really slowly:

check what your default printer is set as. If it's a networked printer or a USB printer, it seems that some, but not all applications take their time polling the system to find that printer. Poser is one that does.

I found a simple fix: I set my default printer to the Adobe PDF writer ( not a real printer). I guess any PDF writer or a similar, software 'printer' would do.

Try it... it might work for you too.

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Windows 10 x64 Pro - Intel Xeon E5450 @ 3.00GHz (x2)

PoserPro 11 - Units: Metres

Adobe CC 2017