How to Minimize Skype to Windows 7 System Tray (Notification Area)

On Windows 7, Skype default behavior is to minimize to the Task Bar.  On Skype dialog, clicking the Minimize button or the "X" (Close button) will both cause Skype to minimize to the Task Bar.

Here’s how to minimize Skype to system tray (notification area) on Windows 7.
Using Skype Built-In Method

1. In Skype, go to Tools -> Options.
2. Then, click on Advanced tab to go to Advanced settings.
3. Uncheck (or untick) the Keep Skype in the taskbar while I’m signed in option.
4. Click Save.

Now when you click the "X" (Close button), Skype will minimize to the System Tray (Notification Area).
Note : clicking the Minimize button will still minimize to the Task Bar.