Once a month, on patch Tuesday or thereabouts. It's a balance between keeping your machine up to date, and not inconveniencing the user. That said, I do strug

Once a month, on patch Tuesday or thereabouts. It's a balance between keeping your machine up to date, and not inconveniencing the user. That said, I do struggle to understand why MS can't rework the deployment mechanisms to just stop/start services etc to allow for on-the-fly upgrades in the background, instead of doing it all at a reboot.