the previous post was belongs to here:
http://connect.microsoft.com/VisualStudio/feedback/details/504538/debugger-hangs-vs-for-a-long-time-when-coming-out-of-debug-mode
and have a look at this: (To disable IntelliTrace)
http://visualstudiomagazine.com/articles/2010/02/18/fix-bugs-with-intellitrace-and-vs-2010.aspx
From above link:
To begin with, the IntellTrace options are located in the Tools > Options menu and the IntelliTrace node. There are several options available in the General, Advanced, IntelliTrace Events and Modules tab. For our purposes we'll stick with the options on the General tab. Here you can enable or disable IntelliTrace -- by default it is enabled.