Microsoft Announces Major Windows 11 Foundation Overhaul After Five‑Year Delay

Problem Statement

Microsoft’s Q4 2026 earnings call revealed that the underlying experience of Windows 11 had become “unacceptably poor,” prompting a public admission of the need to rebuild the OS foundation.

Financial Context

Overall revenue: $90 billion, up 18 % YoY, driven by Azure, Microsoft 365 and Copilot.

More Personal Computing segment: revenue down 4 %.

Windows OEM revenue: down 7 %; double‑digit decline expected next fiscal year.

Strategic Background

Since Satya Nadella became CEO in 2014, the “mobile‑first, cloud‑first” strategy shifted resources toward Azure, growing cloud revenue from under $3 billion to over $100 billion. The focus on cloud and AI left Windows on the sidelines, accumulating experience deficits.

Shift from AI “Sticker” to Core Fixes

For two years Microsoft attempted to mask Windows shortcomings with AI features (e.g., Copilot plugins). The approach proved counter‑productive, leading to a refocus on the OS core.

Insider Build Fix List

1. Classic Feature Restorations

Task‑bar repositioning: The ability to move the task‑bar to the top or sides, removed at Windows 11 launch, is returning in Insider builds.

Search de‑advertising: MSN news cards and promotional ads in the search bar are largely removed, restoring priority to local files and system settings.

2. Low‑Level Performance and Resource Optimizations

Revival of the “20/20” project: Targets reduced idle‑memory consumption, especially on 8 GB machines.

Bug elimination: Memory leaks, slow startup, and Explorer white‑flash issues are being addressed through extensive code refactoring.

3. Detail‑Level UX and Legacy Cleanup

File‑manager speed: Bulk‑deleting fragmented files and faster Explorer home loading; file‑size display now shows MB/GB instead of only KB.

AI feature pruning: Copilot removed from Snip & Sketch; the controversial AI in Notepad renamed to “Writing tool.”

UI modernization: The legacy “Properties” dialog, present since Windows 95, rebuilt with WinUI and fully supports dark mode.

Team, Roadmap and Outlook

A dedicated Windows‑repair team under PC‑division head Pavan Davuluri has slated 18 items for 2026, covering WSL performance, Windows Hello biometric reliability, and the Start menu. Migration to WinUI 3 remains challenging because WinUI itself still faces memory and performance issues, but incremental Insider rollouts indicate progress.