Automating installing all Windows Updates and restart right now

Question in short How to automate with Windows built-ins (batch/PowerShell) or freely available tools, prefereably command-line, following steps: Scan for all currently available updates on WU Download and install them right now (i.e. without any throttling/scheduling/backgrounding) Restart if necessary, closing whatever doesn't closes automatically. I'd also like something that triggers the same background mechanism behind existing WU in Setting panel, not something that will use separate infrastructure by setting up its own download locations or whatever. Background I have a PC that doesn't

Question by Oleg V. Volkov on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.