I recently rebuilt a computer I salvaged from work and loaded Poser 11.3 on it along with V4 and M4 from original installers under Windows 10. Custom runtimes were created for both models on a separate internal drive with their corresponding morph packs installed as well. The installation automatically initialized both models and they work as they should. Another thought, make sure that there is only one instance of V4/M4 installed. Individuals have posted that applying morphs under those conditions did not work correctly afterward. And if you are still using original installers, go back to DAZ and download the zipped versions; I believe that the initializations are already done for you.