Apparently there is a security flaw that was just discovered with Adobe Flash Player. This article gives a link to test what version you have and then a link to get the update with the fix. And if you use several things like IE, Firefox, Chrome, etc. my suggestion would be to go to the site and check thru each one. My IE was updated but Firefox was not, it is now thou.
Adobe issues security fix for Flash Player | ZDNet
I know some don't use the flash player but you should check just in case. It may have been downloaded from a web page that uses it that you may have gone too.