I deactivate each automatic updating of each software, especially security softwares, because automatic updatings occur at random during the day. Then I do this every day one time in the morning after reboot : 1. I copy/update FROM my clean archived primary (work) snapshot TO my primary (work) snapshot. This will remove all possible infections and malfunctions of yesterday. 2. I execute each updating of each software manually, especially security softwares. This will keep my primary (work) snapshot UP-TO-DATE with all the GOOD changes. 3. I copy/update FROM my updated primary (work) snapshot TO my clean archived primary (work) snapshot. This will keep my clean archived primary (work) snapshot UP-TO-DATE. What do you think about this method ? It might be possible that Peter uses this method already or at least a variant of this method. I'm just considering this method as a possible replacement for my frozen snapshot. It's more work than a frozen snapshot and that worries me the most, because I'm quite lazy and I can't schedule them to minimize the manual work.