New
#1
For the really paranoid who don't trust windows update to get it right, you can manually download and install the definitions from here...
https://www.microsoft.com/security/p...tions/adl.aspx
...makes no difference though, you'll still get 1.245.577.0 (I've just tried) :)
Apparently if you are a business customer running Windows 2016 Server...
https://social.technet.microsoft.com...nderATPPreviewWindows Defender AV issues new definitions every 2 hours...
That would explain why the version number seems to have a big jump each time, on that basis I would expect the next one to be 1.245.589.0. Us mere 'consumers' only seem to get a daily update (would you really want them arriving every two hours?).