I actually did mean not. My unit was not installing the Defender update, it said installation was complete each time but upon every restart, I would see the message that I have updates to install and it was always the same numbered Windows Defender update. GreyFox7's suggested link apparently resolved the issue and update finally installed..... for real. Sorry for the long winded retort. I just lovc this device!!Just a guess that you meant now (not) not.