This is probably the same issue reported at:
However those bugs were closed as not reproducible, and the problem still occurs in the "RTW" released September 15. If the attached files are copied to C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\ProjectTemplatesCache, the problem should be reproducible. Deleting or moving these files resolves the problem, however until a user discovers this it's a serious problem.
I'm not able to take the time to discover exactly why the attached files are created, but judging from the number of search results on this topic it appears to be fairly common for real-world developers that have installed Visual Studio before the Windows Phone developer tools. Based on the above, to reproduce the problem I suggest finding out what in the attached files causes Visual Studio to crash, and then finding out why that was generated.