I'm having an issue with you tube in windows 10 with html 5 and in Micrososft edge that uses Adobe flash. I can hear sound out of my fron't 2 speakers but not my rear speakers. I have a gigabyte z77xud5h Motherboard i7 inetl 3rd gen processor 32 gigs memory. I have a onboard realtek Sound card latest drivers I can run anything in windows 10 with various players and get sound out of all 4 speakers but not when I'm online watching videos and not just in you tune either metcafe and other video sites as well. I'm not sure if this is the right section for me to be posting in but I did not see anything for sound. Yes it happens with Google chrome and Firefox also. Doesn't matter what browser I use. Only get sound from the fron't 2 Klipsch 4.1 speakers on my custom built desktop est 2010