I have a notebook and a desktop with Photoshop CS6 on both. (Windows 7 on the desktop, Windows XP on the notebook.) Adobe Updater works on the notebook, but when I try to check for updates of Adobe PS on the desktop I get the following message:"The update server is not responding. The server might be offline...or the Internet or firewall settings may be incorrect." I have Norton 360. I have checked the firewall settings and all Adobe items are set to "Allow". I tried clearing the cache of AUM updater per Adobe help but no difference.