I had this problem today. Windows 8.1, 64-bit
I got it fixed by going to programs and features in Windows. (where you uninstall stuff)
Click on MS Visual Studio 2013
Click REPAIR
and when the options show up as to where to REPAIR from, choose the internet… even if you have a disc or an image. It doesn’t ask for a key or anything.
Let it go. took about 20 mins for me. Then it all worked fine.
Hope it helps you.