Skype is one of the most popular applications for video and audio calls via the Internet. It is available for various plarforms including WIndows, Linux, Android and Windows Phone. Microsoft purchased it to replace their own Windows Live Messenger with Skype. Now it is closely integrated with Windows and even shipped with Windows 8.x as a Metro app.
If you are a Skype user, you might be affected by the application hanging after the first start, especially if you started it for the first time on your PC.