Depending on the default settings under which you are running Visual Studio the Create GUID tool may not be present.
(Tools > Create GUID).
It is very easy to recreate. Simply click Tools > External Tools…, then Add. Populate the tool properties as such:
- Title: Create &GUID
- Command: C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\Tools\guidgen.exe
- Arguments: *leave this blank*
- Initial Directory: C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\Tools\