When I install Flash Player at Internet Explorer, at the 50% downloaded there is another sign Flash Player is already installed at Google Crome and asked me close inernet explorer that I am using. So I closed internet explorer. Then still the box - you must close the internet explorer that you are using now - appeared. I don't know what me to do. Then I click x mark, then Your installment was failed appeared.
I cannot video - for instance, at Youtube, I cannot watch some video slips, because they want me to download "latest version of Flash Player."
Check with the Task Manager's Processes tab if IE is still running in the background.