Jim I have no idea but thanks.
You don't know if you have add ons running?
You don't know if you have turned on compatibility mode for WC?
Please back away from the PC!! Turn it off, and back away slowly, never look back!!
You'd have to go to the cog, top right corner, below the titlebar buttons, click it, click compatibility view settings, then add WC to the list. Maybe that'll help.
Go back to the cog, click it, click Manage addons, then disable any addons, one at a time, till you fix the problem.