Debugging a Cloud Service project in Visual Studio 2013 requires you to run VS under elevated account (such as an Admin). You would receive the following message if you try to Debug the project without running the VS under an elevated account.
This happens because by default the Full Emulator is supposed to run which needs the elevated access.
You can avoid running the VS under elevated account if you change the Cloud Service project’s Emulator setting to “Use Emulator Express” which does not require the VS to run under elevated account. See below.
You would miss out on few features but this may not be a deal breaker for many developers. See the following article for more information – Debugging a Cloud Service with Emulator Express