Yes, identical buffer settings. In fact, it doesn't matter what the settings are at this point, any new project or song as Presonus calls it and its not usable. So I think there has to be something corrupt. I'm going to wipe it and start again early this week.
Edit: Forgot to mention that I dragged the iMac to the basement yesterday and experienced effortless, easy and great sounding recording with no issues whatsoever. Figures. WinDoze......................
Possibly a sample rate issue. Check what the DAW is defaulting to and what Windows is set to. That can be a cause of odd behaviours...