All others. Last one was Windows Defender (KB2267602, 2019-09-05), last not Windows Defender was some NET security update (KB4507422, 2019-08-18) ... Can't find any strictly windows security update installed in history. I guess it's because it is waiting to install this one first. Maybe it has something to do with GWX app, that is supposed to prevent from updating to Windows 10? But there were no problems before. Or some kind of virus?I do monitor processes manually with Microsoft Process Explorer, searched for rootkits as well, nothing found. Monitoring startup changes (services, registry etc) as well, nothing that took my attention. Windows is original and activated (from MSDNAA).