#https://superuser.com/questions/349866/which-of-the-windows-updates-are-really-necessary

> I downloaded a lot of Windows updates in the automatic mode.
> 
> Are they all necessary? Can I remove some of them?
> 
> How do I know which ones are necessary

A lot of people probably wonder this: do I _really_ need to download all 50 updates? My precious bandwidth! Ranon's answer goes into some good detail about the different types of updates and how important they are. A blog post about this might optionally talk a bit about WSUS for managing updates, and various update-packaging software (do those still exist?) so you don't have to re-download on every machine. 

I won't have time to write about this in detail, but if it wins and nobody else picks it up, I'll post a quick summary to the blog.