Visual Studio 2015 installer hangs during install?

Question

I downloaded the full ISO for Visual Studio Ultimate CTP 6. The installation program got to about the 90% mark, gauging by the progress bar, and just stuck there. There wa

Answer 1

Mine got stuck applying the .NET 4.6.1 blah... Turning off the internet and disabling Microsoft Security Essentials Real-time protection got things moving again.