FYI I just found this info and as I have an NVIdia card, I decided to give it a shot. AMAZINGLY this fixed the problem.
Hope it can help others.
Here is the URL I found it: https://helpx.adobe.com/photoshop/kb/...
Here is the snippet I followed:
Adjust graphics processor settings
If you can launch Photoshop: Choose Edit > Preferences > Performance, and deselect the Use Graphic Processor option.
If you can't launch Photoshop: Move the sniffer.exe file from C:\Program Files\Adobe\Adobe Photoshop CC 2015 to your desktop and try to restart Photoshop.
If you have more than one graphics card on your computer:
NVIDIA and Intel:
Right-click the desktop and choose NVIDIA Control Panel.
In the sidebar, select 3D Settings > Manage 3D settings. Click the Program Settings tab.
Add sniffer.exe and Photoshop.exe (from C:\Program Files\Adobe\Adobe Photoshop CC 2015).
Save the changes.