I got email from Microsoft. Maybe you did too. Subject: URGENT—Action needed before April 10 to help protect your PC Your final Windows 10 security update is on April 10, 2018 ... It sure looks like a scam but it really is from Microsoft. It is very badly worded. - it really only means that an old version of Win 10, "Anniversary Edition" will receive its last update on April 10 (one year after release). This explanation is nowhere in the email -- I had to infer it from googling. This is no big deal because the updates system will automatically take the system to the newest released version anyway. Well, it will try. The Windows Update system regularly chokes on my small systems. Mostly because Microsoft mandated 2G RAM and 32G disk for cheap licenses and update does not reliably work within those resources. Its failure modes are various, pathetic, and undocumented. - the message does not tell me which of my systems are still on old versions. I have lots of systems with Windows licenses that barely get used. Oops, in the HTML salad of the email was a link to a web page showing the status of all my devices (but it doesn't highlight the ones "at risk"). My major use-case for Windows on those machines is updating Windows. A secondary use-case is updating firmware of systems whose manufacturer is smart enough to release firmware updates but dumb enough to require Windows for those updates. - if the final update is to be released on April 10, should I not update on or after that date, not (just) before? In no way is this my final Windows 10 security update unless I scrub Windows from my systems. Or something more important ends (me, Microsoft, the world, ...).