Visual Studio 2015 installer hangs during install?
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 was frequent activity from Superfetch, Anti-malware protection, and other background processes, but the progress bar was dead still. Eventually the background task activity subsided after 20 minutes, but the progress bar still wouldn't budge.
CHEAP TRICK: Open a notepad window and position the left edge of it so it perfectly marks the current position of the progress bar. If it the progress bar doesn't move past the left edge of the notepad window in about an hour, it's probably stuck.
Answer
This was a case of one of the sub-installers getting stuck during the install and never completing. Unfortunately when this happens, it looks like the master installer never times out the operation. The trick is to open up the Task Manager in detail mode, and look for a sub-installer process that is showing 0% CPU usage and 0% disk usage, indicating it has died. Then just kill that process and the master installation will resume. In my case, the name of the sub-installer was SecondaryInstaller.exe and according to the installation log it happened while it was trying to install some Android SDK components for the cross platform development modules. It had frozen permanently. I killed it and the master installer completed. When I ran Visual Studio it was fine, although I'm guessing I'll have to do some digging on the Android components install problem.