New MS Copilot centered OS Plans Leaked

This would pretty much end GUI customization...if

https://www.ghacks.net/2026/08/27/microsoft-os-prototype-project-aion-leaked-revealing-copilot-centered-interface/
from WinCustomize Forums

No one's saying this is an immediate, actual MS planned OS, nor is any of this proof it will be. 

It could be "just tossing an idea around". Or, it could just be MS tossing a cat in, among the pigeons. It's kind of strange to create an OS and not consider it for use, or further development, but MS is a strange place. It's also a strange way to drum up business among folks already angry about AI and data centers.

From Arthur Kay's gHack's article (see external link above):

Internal documents that have been leaked and a video have shown that Project Aion was an experimental project carried out by Microsoft for 2024 or earlier in which Copilot was placed at the heart of the interface.

The material describes a web-based prototype that is operational and has been built using a modified form of Microsoft Edge together with a lightweight Windows codebase known as Win3 within the company.

The documents that have leaked show the name CopilotOS and describe a plan under which Copilot would become the primary means by which people communicate, find entertainment, learn and carry out various tasks. Microsoft has refused to comment on the project. The leaked material does not prove that Project Aion is a product which Microsoft intends to launch.

It's Project Aion, in which the Windows shell is replaced with Copilot. 

I'm not going to summarize, etc. here. Just bringing an interesting pebble I found while walking on the endless internet beach home for you guys to look at while having a great weekend, I hope. :thumbsup: 

Personal Computing Artificial Intelligence Type: Discussion
351 views 4 replies
Reply #1 from WinCustomize Forums Top

I had seen this on Windows Central a few weeks ago, and according to Zac Bowden "...there's a version of Aion that also runs on top of Windows 11, which would presumably support running Windows apps natively. But the version in the video appears to be based on the Win3 version, which sources tell me is a stripped back version of the Windows codebase that does not include support for legacy Win32 apps in exchange for faster updates, longer battery life, and better security."

I don't see this actually happening unless it becomes a separate, optional OS version. I'm sure that Enterprise users could develop their own Agentic shell for Windows 11 that runs internally, based on the company's database.

This could be another Windows 8 moment for Microsoft if they actually follow through with this OS. I certainly will not be using it!

Reply #2 from Stardock Forums Top
Quoting pelaird, reply 4146207

if they actually follow through with this OS. I certainly will not be using it!

End of pelaird's quote

That'll be the two of us. I'm the last person on this planet who would use an AI centered OS. 

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Reply #3 from Stardock Forums Top

The Copilot shell is the part everyone is reacting to, and I think it is the least of it. A shell is replaceable. People here have been replacing or reskinning the Windows shell in one form or another since the Windows 98 days, and if Microsoft ships a chat box where the Start menu was, someone will ship a way to put the Start menu back.

The line worth reading twice is the one pelaird quoted: Win3, no Win32. That is the part that would actually change anything. An OS without Win32 is not one where customization gets harder, it is one where there is nothing for the tools to attach to in the first place.

Microsoft has tried that trade three times already. Windows RT in 2012, S mode after it, and 10X, which was announced and then cancelled in 2021 without ever shipping. The pitch each time was the same one in the article: longer battery life, faster updates, a safer machine. Each time the missing Win32 support turned out to be the entire objection, and each time they walked it back or let it quietly die.

So I agree with pelaird that this does not replace Windows 11. I would not bet on it never shipping at all, though. A locked down web based OS on cheap hardware is something Microsoft has wanted for well over a decade, and Copilot is the strongest internal argument they have had for it yet.

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Reply #4 from Stardock Forums Top

No win32 means no apps. Everything is launched by Copilot and Edge, supposedly replacing W11 w/o a start menu, etc. Everything is web based. 

The computer revolution started with everything on the computer. Now? Everything will be on the web. IFF this goes forward. As I stated, I also doubt it will. I can't help but wonder if all this will be helped by the AI RAM crunch.