Microsoft releases KB5095093 to speed up File Explorer on Windows 11

Microsoft rolled out the optional KB5095093 preview update for Windows 11 24H2 and 25H2, which it says “improves the speed and performance of File Explorer” on launch [1]. The change matters because File Explorer has been a long‑standing performance pain point in Windows 11, and faster launches directly affect everyday productivity for millions of users.

What the update does

The update replaces the pre‑loading strategy Microsoft shipped last year—a method that doubled Explorer’s memory footprint without closing the performance gap with Windows 10 [1]. Instead, KB5095093 reshapes the Home tab layout, a move Microsoft has not detailed technically but frames as a launch‑time speed boost. Alongside the main change, the patch resolves several usability bugs: the address bar now displays paths and suggestions without freezing, mounting disk images feels less sluggish, and a folder‑renaming issue that ignored case‑only changes is patched. A BITS‑related bug that could delay shutdown is also fixed [1].

How it fits into Microsoft’s broader performance push

KB5095093 is the latest step in a series of Windows Shell optimizations. Earlier this year Microsoft introduced a WinUI 3 rewrite that cut Explorer’s memory allocations by 41 % and reduced launch‑time code execution by 25 % [1]. Shell lead Tali Roth has said the team is pursuing “targeted optimizations” such as trimming disk reads and reducing hangs [1]. The new update also aligns with the “low latency profile” Microsoft is testing, which temporarily boosts CPU speed for UI actions like opening Start or Explorer to improve perceived responsiveness [2]. While some users worry about power draw, Microsoft and GitHub VP Scott Hanselman argue that short CPU bursts can actually lower overall energy use via the “race to sleep” effect [2].

Competitive context

Microsoft’s effort to tighten Explorer’s launch time comes as Windows 11 faces growing competition from Linux‑based gaming platforms, notably SteamOS, which Microsoft has cited as a benchmark in its Project K2 initiative [1]. Faster Explorer performance helps retain desktop users who might otherwise switch to alternative operating systems for smoother file management. The update will be bundled into the July 2026 cumulative update, meaning the broader Windows 11 base will receive the improvement without needing to opt‑in [3].

What to watch

• July 2026 cumulative update – confirms when the speed boost becomes automatic for all Windows 11 24H2/25H2 devices.
• Future low‑latency profile rollouts – additional CPU‑boosting tweaks could further narrow the responsiveness gap with competing OSes.
• User‑reported performance metrics – third‑party benchmarks will reveal whether the launch‑time gains meet expectations set by the earlier WinUI 3 rewrite.

The KB5095093 update shows Microsoft’s continued focus on shaving latency from core shell components, a necessary step if Windows 11 is to stay competitive in a market where speed and smoothness increasingly drive user choice. Whether the undisclosed launch‑time improvements translate into a noticeable everyday benefit remains to be measured.