I have a Samsung Series 7 NP700Z5B-S01UB laptop running Windows 7 Ultimate. I primarily use the Google Chrome browser and am always up to date, running from the stable channel. My problem is that I cannot view HTML 5 video - in any web browser. This was tested with Google Chrome, Mozilla Firefox and Internet Explorer. I can see HTML 5 video controls, and when I hit play, the audio from the video plays, but the screen stays black. No video, and this is tested on multiple sites, at least 10 different sites.
I started in safe mode with networking and HTML 5 video played just fine, so it has to be something on my computer. It has to be a setting in Windows or something I've installed, but I do recall it happening on one of the first days using this laptop.
My security program for always-on protection is Microsoft Security Essentials. I also use Malwarebytes Antimalware, SUPER Anti Spyware, Hitman and Adwcleaner, but all of those are on-demand and shouldn't interfere with the video.
I was hoping for some help figuring out which steps I should take to figure out what is blocking the video. Thanks guys.