i got surface pro on the first day morning. and I found this microphone problem hours ago when I first make a Skype phone call with my friend. My friend told me that there is very loud background noise. So I make some tests with several recorder app in different room and tried to unplug power . And the noise is not caused by fan. The background noise is big enough to be noticed (very big in some sense) and sound like electronic noise. Like electromagnetic interference. So I wonder if you guys have the same problem? or I guess I need to replace for a new one.... I always get bad luck on electronic stuff... Could anyone try it out? thank you.