From: Tirofog | #007
Most of those at least close the window while running the program in the background. Skype literally just minimizes the window, which makes no sense at all. If I wanted to minimize your program, Skype, I would have clicked the minimize button slightly to the left instead.
Open up Skype, go to Tools -> Options -> Advanced -> Advanced Settings, and uncheck "Keep Skype in the taskbar while I'm signed in." if you want the x button to close it.
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