I use Light room to do most of my photo work, however once in a while I need Photoshop. I open the photos in Light Room and if more work is needed I will select "Edit In PS" from the Light Room menu. The issue is that it takes up to a full minute just to open a Canon 7DmII raw file which is very frustrating. Here is what I have done to date.
Reinstalled Windows 10pro
Reinstalled my Adobe products / Light room and Photoshop.
I'm running the following equipment.
Dell T5810 workstation Xeon E5-1630 processor running at 3.7ghz