I recently downloaded a trial version of NOD32 for linux and then installed it in Linux Mint which I am also trialling. So I'm not sure if this is a Mint issue or NOD32 issue. When I downloaded a couple of files today, near the end of the download the system froze for a few seconds and the screen dimmed as if it was just about to go into screensaver (it is not a laptop so is not likely to be a power saving feature). I wonder if this was NOD32 intercepting the download and scanning the file? If so is this normal behaviour (no messages about scanning were seen)?