This has been driving me nuts. I don’t know what particular combination of things contributes to it, but the Git source control provider that’s built into Visual Studio 2013 just hangs the whole system. I change it to “None” in Tools/Options, but every now and then it comes back. I never, ever use it – CLI all the way – so its very existence was offending me to the core. Now, I think I’ve found out how to kill it, via that old nasty-hack-atron, regedit.exe.