Hello I have a mac mini and all of the sudden when starting up the finder mounts and then the finder reboots itself. I click on any app on the dock, opens and finder reboots and the app is closed. I have started the mac mini via target disk mode, deleted any strange app, runs diagnostic, everything fine. When restarting... same thing. Any clue? virus? I haven't downloaded any Flash drive or anything, I am not into downloading random stuff, usually a PDF manual or a picture or some attachment from a know email address. Thank you.