Hello, I'm new to Macs, so forgive me if this is a stupid question... While using Finder today, I noticed that a "Remote Disc" icon had suddenly appeared on my new iMac. (21.5", 2.7 GHz Intel Core i5, running OS X v 10.8.2). There are currently no other computers on the network (just my iMac and a Roku)... and I just changed my wireless password to be sure. What concerns me isn't so much the icon (although I don't want it there)... it's that it literally just appeared... and tech support told me, basically, "Um, it's a feature and sometimes it just magically appears like that... it might also just disappear". I'm not making that up. I wish I were. I even reinstalled the OS to get rid of it- but it didn't work. Any help would be appreciated.