Windows 11's 5GB monthly .msu updates, AI is only part of the problem
Article URL: https://www.windowslatest.com/2026/04/29/i-investigated-windows-11s-massive-5gb-monthly-msu-updates-ai-is-only-part-of-the-problem/ Comments URL: https://news.ycombinator.com/item?id=47944511 Points: 1 # Comments: 0
Article URL: https://www.windowslatest.com/2026/04/29/i-investigated-windows-11s-massive-5gb-monthly-msu-updates-ai-is-only-part-of-the-problem/
Comments URL: https://news.ycombinator.com/item?id=47944511
As it runs in the background, you might not have noticed it already, but Windows 11 updates are getting huge. Monthly cumulative updates downloaded via Update Catalog are now regularly crossing 4GB, and in recent cases, even touching 5GB. The numbers get even more absurd when you look at what’s inside those updates. Our analysis showed a cumulative update expanding to nearly 9GB once extracted!
Note that this analysis is about the updates downloaded from the Microsoft Update Catalog, which is the original size of the update before it’s modified for your computer, depending on what hardware you have and which updates you’ve already installed. Windows Update applies hardware checks and pulls only the changed parts through Express updates and UUP. So, a 4GB catalog package can become a 1.5 to 2GB download at home.
Either way, the actual update sizes have increased drastically, and the obvious explanation people jump to is AI. Windows is adding Copilot, on-device models, semantic search, and everything around it. So naturally, it must be AI bloating updates.
We found that it’s only part of the story. The real issue is how Windows updates are built and delivered. The size problem is about how new features are packaged, compressed, and distributed across millions of different systems.
I’ve always found it odd that an update that barely changes anything noticeable downloads gigabytes of data in the background. It’s also something to think of at a time when Storage is an expensive matter.
So, I did the research to find out why these Windows 11 updates are so big in the first place. And more importantly, can’t Microsoft just push updates only for the parts that change?