Photoshop fails to run but Task Manager shows it Running
Had this issue at least twice. Photoshop does not open the dialog, but just sits in the background. In fact if you look at task manager [PC] you can see it running with 0% resources, and if you try it again, a second or more instance will be running, but nothing on screen.
It appears as though the issue is the graphics process, but you cannot get to the preferances panel to change it GPU settings, memory use, etc.
The fix for me was this:
1. Uninstall Photoshop - you probably need to restart computer to do this
2. Restart computer
3. Install Photoshop
4. Start photoshop and go to edit preferance set GPU off
5. If you exit photoshop before setting these preferances, you will not be able to restart it
6. exit PS restart computer
