many times. im getting the Complete Action window popup with both Always and Just Once greyed out when I press the Home button. I've actually have my data backed via USB now. system is fine just not able to get past the popup window.
Welcome to Android Central! When you get that Complete Action window, do you have any launcher option to choose? If not, did you disable the stock Launcher when you installed Nova? Go to
Settings>Apps (or the App Manager, which is I think how Samsung refers to it), and look for your Disabled apps. Disabled apps are typically listed at the bottom of the "All" list, or have their own category, depending on the Android version. Look for something like "Launcher" or "Homescreen" as a disabled app. If you find it, tap it and tap Enable.