It's been a few months since I updated any drivers, so I'll check that. I entirely forgot about Event Viewer. I'll see if it provides any other information. Thanks Mike.
I do appreciate everyone trying to help. I'm definitely scratching my head here as well as all other versions of PI I have installed have worked fine.
I have noticed that after uninstalling 1171 and reinstalling 1123 my PI environment comes back up exactly as it was, with all the same global preferences, explorer tabs, etc. Could there be some sort of setup file in my user space that is not playing nicely with build 1171? I may also try a PI reset with 1123 installed, then uninstall it before installing 1171 again.
Regards,
David