I just purchased CC for Photoshop and Lightroom. When trying to install it, I get an error stating that I have no Internet connection, which is totally false. I've been looking at stuff on the forum and one place gives a number of things to look for. One is to be sure that I have installed the GlobalSign Root CA certificate. I'm looking at how to install on a Mac, but the link gives information on how to install on a PC. Not much help there.
Well, something on your system is preventing the installer from contacting Adobe's servers - and it acts like you aren't even connected to the network.