I am having the same issues as some of you are having and I am getting tired of this troubleshooting issues . I even tried playing youtube videos with someone's I Pad and the video screen is blank with the spinning icon . I also tried Real Player and it worked fine until today it quit working too . Really it is getting frustrating for all of us and especially me . Do you all think it is the Adobe Flash Players having issues themselves or is there a reason why our Computers are not responding ? It seems very confussing and it is time that someone check this serious trouble shooting problems with Flash Players . Do any of you think it is the websites that could be updating too much maybe throwing our Computers off ?
RealPlayer = BAD BAD software. I don't use it and don't recommend anyone else should either.
There are VERY DETAILED instructions to do a "clean install" here: http://forums.adobe.com/thread/1343084
I did them with OS10.7, but they work the same for Mt. Lion or Mavericks.
It's BAFFLING to me why it's so hard to find the "full installer" for Flash Player. It's like Adobe doesn't want us to update.
Anyway, check out these instructions and most importantly, the download link.
The FULL installer is linked to in both the Clean Install instructions and the detailed clean install link I posted.
I post the link to it about four dozen times a day here. It's almost impossible to find a Mac post I've replied to that's more than two clicks away from the FULL installer DMG link.