Try closing the other applications that may be using the sound card and play the video again. These will sometimes cause unpredictable results with other applications. Disable the RAM optimizing software and try again. Go to the web site for your computer or sound card vendor and download the latest sound card driver. My browser is crashing when I visit a page with a VivoActive video on it.
Crashes are often the result of incompatible hardware drivers.
VivoActive has been tested on a limited set of sound cards and display cards. We support those cards that are Microsoft certified. There are many other brands of cards that will work fine. But there are some with incompatibilities that may only be apparent with VivoActive Software. Sometimes you can correct incompatibilities by downloading the latest version of sound card or display card driver.