I recently installed Linux Mint 5 main edition. The lock shows there are 104 recommended software updates. However, when I click on it, nothing happens. When I go to Elyssa and try to launch mintUpdate, nothing happens. The same with Package Manager. Neither of these two launch. I checked MD5 and that is ok. I re-installed Mint 5 thrice. Yet, nothing. I've tried typing "apt update" in terminal and get a message "unable to resolve host desktop"