I was surprised that there were updates for MS Office both on the first Tuesday and the second Tuesday. I thought that they were now only coming on the first Tuesday of the month. So I searched the forum; I seemed to remember that there was a post about it. I found the post by stapp: https://www.wilderssecurity.com/threads/bork-tuesday-any-problems-yet.370217/page-84#post-2579785 The post from stapp points to http://windowsitpro.com/microsoft-o...gular-monthly-update-schedule-office-products And from there the MS blog https://blogs.technet.microsoft.com...he-release-schedule-for-non-security-updates/ So, while a bit confusing, it explains the two update Tuesdays. Confusing in the sense that you (well, me) would expect that an update with the Critical or Definition classification, would also be called a Security update. I needed it to be "clear" to me. Maybe it would others help too, that's why I give it a separate thread. Ron posted the change also here: https://www.wilderssecurity.com/threads/microsoft-updates-and-notifications-for-april-2016.384895/ Thanks to stapp and Ron!