I'm just using Nod 32 Antivirus and not the other versions, but I'm also seeing some strange behaviour after I was upgraded to version 22.214.171.124. After rebooting to complete the update I got a notification from the Windows action center that said something aloung the lines of "neither Eset or Windows Defender is turned on", even though Eset was all green in the Windows Security Center and running in the taskmanager. I have not been able to recreate that though, it only appeared after upgrading to 126.96.36.199 and rebooting to finish it. Now whenever I turn on my computer it would seem that Windows Defender is doing something in the taskmanager for a couple of minutes and then goes away. It's worth pointing out that I do not have periodic scanning for WD turned on in settings and never have. Screenshots attached. Should I be worried about this? Also I forgot to mention that there also seems to be a few errors related to this in the Eventviewer. A new one seems to appear after every reboot since upgrading to 188.8.131.52. Translation: "The service Windows Securitycenter could not read occurences of AntiVirusProduct from the datastorage"