Would there be a pc only program that would not install using Parallels? If so should it install properly if you did it in boot camp???? I am trying to install a pc program I use for work. It is not Mac compatible. I only have Windows set up in Parallels. When I try to install the program I get an error that says InstallationMngr.exe is not working properly. I did a search in Windows and it is saying "required parameters were not passed along to the installation manager". The program in a mortgage software called Encompass360 by Ellie Mae, Inc.