Intellisense updating indefinitely

When I add a single line of code to a project (created from existing code), a window appears with the message: 'Please wait while IntelliSense and browsing information are updated...'. This message remains there indefinitely (at least more than half a day) and I have to kill VS2013 using task manager. The project is fairly small, perhaps 30 .cpp files, and part of a solution that also contain a nodeJS project.

Any suggestions on how to fix this issue?

Thanks