Websites were not recognizing that the program was even installed. Websites kept asking me to install the program, even though Flash Player 18 was installed. The trouble shooting website (Installation problems | Flash Player | Windows) kept saying that no Flash Player was installed on my pc and/or was not enabled.
As can be seen in the photo above, Flash Player is installed and Flash Player is enabled in both Firefox and Explorer browsers.
I just tried the Installation problems website again and now finally - the website is recognizing that the program is actually installed.
Today for the first time!!! -.For whatever reason, Flash Player 18 is now being recognized as being installed on my PC.
Update - Some of Shockwave flash player games are playing, some start to play but go to a black screen, and NBC videos show a green screen.
At least the trouble shooting website realizes that the program is installed...
Green screen is now gone - I right clicked while Flash Player video was "green" and disabled hardware acceleration.
Flash Player 18 had defaulted back to enable hardware acceleration and my PC needs that option off.
I have no idea why it took 5 days for websites to actually recognize that FP 18 was actually installed on my PC.