I'm regularly finding the Mute All option in the Playback Volume window enabled:
The reason I'm posting here is because this has arisen during the last week or two, a period during which I've been using MEP 2014 intensively for 8-10 hours a day on my XP PC. Other candidates (resident or heavily used programs) include Macro Express Pro, Google Earth, Firefox and Memory Map. Of course, there are dozens of other less frequently used apps and tools that could be causing this, or some OS glitch.
I get maybe 1-3 crashes per day from MEP (my project is fairly complex) and that's why MEP is top of my suspect list. I suspect that some of these crashes (often freezes that require forced termination via TM) may somehow set Mute All on. Anyone had similar behaviour please?