It seems to be a big issue with Microsoft Windows RT-the volume keeps muting on it’s on.Many suggestions are given like:-
1]Suspected Skype App running at the background is responsible for such.
-Reality:uninstalling Skype didn’t help.
2]Updating the Surface to fix the issue.
-Windows update till now has no such hotfix.
-so far no full proof evidence has been found.
4]Does it happen all the time?
-Hmm..random;nothing can be said when it will really happen.
5]Does the volume drop to 0(zero) or,it just gets muted?
-Maximum reports reveal tat the volume level doesn’t come down to 0(zero) but just gets muted.
6]Does Refresh or Hard Reset help?
So what’s the fix?
“We’re still investigating the issue, however it appears that the cover may be the issue.
You can do the exchange yourself here: http://myservice.surface.com or by contacting our Technical support team here: http://www.microsoft.com/surface/support/contact-us/.