I am using VMPlayer 15 to run a Windows 7 guest operating system on a Windows 10 PC. I have been having problems with the guest OS lately that I can't explain. The guest OS runs very slowly, there have been network connection issues, there have been problems using multiple monitors and most annoyingly, the mouse seems to randomly switch back to the host. My "gut" is telling me that the guest is to big for the host. When I say too big, I mean that the guest is configured so that it is more powerful than the host can handle. I am not even sure if that is possible using VMPlayer.