I am experiencing an issue with Visual Studio Ultimate 2013 hanging with a "Waiting for Operation to Complete" message whenever I launch it.

This dialog appears every time I launch Visual Studio and never disappears. As of the writing of this post, Visual Studio has been doing this for a half-hour. This is my fourth attempt at trying to get Visual Studio to start. Does anyone have any idea how to solve the problem? I am using Visual Studio Ultimate 2013 with Update 2 on Windows 8.1 Pro x64.
/logswitch, so you can examine the startup logs? – Ƭᴇcʜιᴇ007 Aug 19 '14 at 19:54