Visual Studio 2010 Hangs on Load

Visual Studio 2010 Hangs on Load

Problem: 

When loading Visual Studio 2010, the user interface freezes displaying "Loading toolbox content from package" followed by a component name and a GUID as picutred below...

Solution:

1. Exit Visual Studio
2. Navigate to the affected user's profile folder, i.e. c:\Users\[UserName]
3. Beneath the user's profile folder, you should find \AppData\Local\Microsoft\VisualStudio\10.0
4. Locate the file toolbox.tbd and rename it to toolbox.old.
5. Run Visual Studio, after a few minutes the UI will became responsive which indicates that it completed rebuilding the toolbox.tbd file, which should now be smaller.

 References:

 Similar Microsoft Connect Bug and Workaround