VS2010默認安裝的是MVC2，安裝MVC4必須先裝 SP1，然后安裝MVC4.
VS2010 SP1 (1.5G)下載地址：
http://go.microsoft.com/fwlink/?LinkId=210710
MVC4(在線安裝)下載地址：
https://www.microsoft.com/web/handlers/webpi.ashx/getinstaller/MVC4VS2010_Loc.appids
VS 2010 簽入時 報錯：
Checkin cannot proceed because the policy requirements have not been satisfied.
解決辦法： 安裝tfpt.msi
參考：
http://www.dotnetbase.co.uk/post/2011/05/05/TFS-2010-Error-loading-the-Changeset-Comments-Policy-policy.aspx
http://blogs.msdn.com/b/ramoji/archive/2009/08/26/checkin-cannot-proceed-because-the-policy-requirements-have-not-been-satisfied.aspx