I want to keep my systems up to date. Not everyone does. As I understand it, Windows Update does not update the Linux portion. Yet another step to keep a Windows system safe as possible. My drill: - Run Windows update. If it actually applied an update, you should run it again in case the update enables a subsequent update (you cannot tell by its cheerful declaration that your system is up to date). Rinse and repeat. BTW, Windows Update seems unreasonably slow. And prone to inscrutable failures. - go to the Microsoft App Store and get updates. Be careful, it too can prematurely say that your apps are up to date. - ask the machine vendor's software if it has driver or firmware updates (Dell, Lenovo, HP, ...). Sometimes I have to manually download and install firmware updates. - for WSL: "sudo apt update" and "sudo apt full-upgrade" - for each piece of third party software, ask it if it has updates. This includes FireFox. My Linux drill: - [Fedora] "sudo dnf update" [debian family] "sudo apt update" and "sudo apt full-upgrade" - once in a while: "sudo fwupdmgr get-updates". If the vendor doesn't support the Linux Firmware project, another process is required (maybe involving Windows). Linux sure wins here!