I use an android version on a samsung phone as backup. It always works fine, but today I had a bad surprise, the SD screen disappeared, covered by a pub screen !!!! First time I noticed this. I am used to these invasions but this is the first time with SDemon !! Is there some hint to avoid this ? it it really a bad thing. Perhaps I will decide to close my google accounts even if it is practical for the Agenda and other issues.  This is not a problem of SD of course, except if there is some way of avoiding it through some parameter I ignore ?