I have a story similar to the one posted here: The main difference with my issue is that, since it began last summer, it has never worked. I have no audio when running Flash-based content in any 32-bit browser (IE9, Firefox, Chrome, Safari). I typically use YouTube as my testbed. If I am simply using programs on my computer or if I use the 64-bit version of IE9 to access YouTube, I can hear audio without a problem. Another site that gives me the same problem in 32-bit browsers, but works fine in the 64-bit version of IE9, is Amazon's Cloud Player for Web. My son also plays games using Steam, many of which are Flash-based, and he sees significant performance issues when playing these.