If you have ever experienced that when you create a new project in Visual Studio 2010 some templates are missing (a good example is Windows Serive Template) then follow these steps and you most likely get them:

Open a command prompt and go to C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE>
Then type
devenv /installvstemplates

When its done, reopen Visual Studio and the templates should be there