Is Microsoft Building a "ChromeOS" Killer? Inside Leaked "Project Aion" (Copilot OS)
Imagine turning on your computer, and instead of the classic Windows Start Menu, you are greeted by an AI assistant ready to do everything for you. No clunky desktop apps, no heavy background updates—just a fast, lightweight system built entirely around the web and AI.
Well, this isn't just science fiction. A leaked internal video from Microsoft, dating back to 2024, has revealed that Microsoft was actively exploring exactly this concept.
Let's dive into what this leaked "Copilot OS" (codenamed Project Aion) is, how it works, and whether it could actually compete with lightweight alternatives like Google's ChromeOS.
What is Microsoft "Project Aion" (Copilot OS)?
According to a report by Windows Central, Project Aion was an internal Microsoft exploration to build an operating system centered entirely around Agentic AI and web technologies.
Instead of running on the heavy, traditional Windows database, Aion was built on a stripped-back, lightweight codebase called Win 3.
Here are the key highlights from the leaked video (referenced in Subtitle 1.srt):
-
No Traditional Start Menu: The classic Windows Start Menu is completely replaced by a Copilot button and an "Omni box." This box acts as your central hub—you use it to search files, open web apps, and browse the web using natural language.
-
Web-Apps Only: Because it uses the lightweight Win 3 core, this system cannot run legacy desktop apps (like classic
.exeor Win32 programs) natively. Instead, it relies entirely on web apps (like Microsoft Word inside the Edge browser). -
"Spaces" Feature: A unique taskbar feature that automatically groups related websites and web apps together into organized "buckets," letting you reopen entire workspaces with a single click.
-
Virtual Windows 11: If you absolutely need a traditional desktop app, you have to stream it from a cloud-based PC using Windows 365.
The Big Comparison: Is This Microsoft’s ChromeOS Flex?
If this web-first, lightweight approach sounds familiar, that's because it is exactly what Google does.
Google offers ChromeOS Flex, a free, ultra-lightweight operating system designed to be installed on old, slow PCs and Macs. It breathes new life into aging hardware by stripping away the bloat and focusing entirely on web applications.
Microsoft has tried (and failed) to do this before with projects like Windows Core OS and Windows 10X. They wanted a clean, secure, and fast system to compete with Chromebooks in schools and businesses. However, those projects were ultimately abandoned.
Could Project Aion have been the savior for older PCs that can't officially upgrade to Windows 11? Possibly. But there is one giant catch: Copilot.
The AI Dilemma: Do Users Actually Want This?
While a fast, secure, and lightweight version of Windows is highly appealing, tying it entirely to AI might not be what everyday users want. Many users prefer simple, predictable interfaces over "AI-first" experiences that try to guess what they want to do.
In fact, a reader commenting on the Windows Central article pointed out that Windows has been losing desktop market share to Mac and Linux. This sentiment echoes a wider frustration among many users who feel Microsoft is pushing AI features too hard, rather than focusing on stability and giving them a clean, lightweight operating system that just works.
If Microsoft built a "Windows Flex"—a super simple OS built around Microsoft Edge without forcing Copilot onto the user interface—it could be an incredibly popular way to save millions of older computers from ending up in landfills.
Where is Project Aion Now?
Because the leaked video is from 2024, it is highly likely that Project Aion has evolved. Recently, Microsoft announced Project Solara, an "agentic platform" that generates user interfaces "just-in-time" based on what the user asks for. Solara is designed to run across multiple platforms, including Android (AOSP) and Windows. It is very likely that the lessons learned from Aion were folded directly into Project Solara.
Whether we will ever see a true, consumer-ready "Copilot OS" remains to be seen.
I’ve also made a video on this topic — you can watch it below.
Check out my other posts, I post useful tutorials and tech tips, maybe you will find something useful 😉.