Not sure there is a good option here. I would if have not done so tried doing a repair of visual studio 2013. Other suggestion is to disable any visual studio 2013 add in or extensions you might have installed.
Are you running vs 2013 in one of the supported operating systems? Final question is what type of project are you working on?
Windows 7 SP1 (x86 and x64)
Windows 8 (x86 and x64)
Windows 8.1 (x86 and x64)
Windows Server 2008 R2 SP1 (x64)
Windows Server 2012 (x64)
Windows Server 2012 R2 (x64)