I have a Visual Studio 2013 solution that is under source control (TFS, Visual Studio Online). It is mapped to a local workspace, I have checked out some files (e.g. web.config,
I had the exact problem on a company computer. I had to uninstall VS 2013 RC2 and reinstall vs2013 ultimate. Then I had to go through the update process for update 1. I believe it must by the Symantec progressive scan along with the VS 2013 upgrade handling of files. I guess the moral of the story, if I can be so cliché is "If it aint broke don't fix it".