Microsoft is rolling out Windows 11’s built-in Internet speed test feature to all eligible 24H2 and 25H2 users with the latest April 2026 cumulative update KB5083769. This feature had previously been tested before the official release of 25H2 in September 2025, but details were limited at that time and only available to users participating in the preview. It wasn’t until the February 2026 Category C optional update KB5077241 that Microsoft began to gradually open this feature to non-Insider users.
According to the cadence calculation, this built-in network speed test should have been rolled out to more users with the "Patch Tuesday" update in March 2026, but in fact it did not fully cover all devices. For users who have not yet received this feature before, this April patch KB5083769 is regarded as a "cover" push, and the speed test entrance will appear in the system. Ookla announced this week that the Speedtest capability is "now broadly available to all eligible Windows devices" based on a partnership with Microsoft, further confirming the full arrival of the feature. For users looking to do a clean install or upgrade via ISO, Microsoft has also updated the Media Creation Tool to support the latest Windows 11 images that include this feature.
According to information announced by both parties, Ookla has reached a cooperation with Microsoft to integrate the Speedtest service directly into Windows 11, allowing users to run network diagnostics directly in the system interface without relying on browsers or third-party applications. Users can right-click the network icon in the taskbar, or find the relevant entry in the quick setting interface such as Wi‑Fi and cellular network. After starting, they can detect indicators such as download speed, upload speed, latency, and network jitter. From an experience point of view, this entry will still open a web-based speed test instance on Bing when called, which is essentially equivalent to calling the Web version of Speedtest. However, compared with the past practice of manually opening a browser and entering keywords such as "speed test", system-level integration reduces the operating steps and makes network diagnosis more direct and convenient.
At the technical implementation level, this speed test feature in Windows 11 relies on Ookla’s global infrastructure and is based on its Speedtest Web SDK launched in 2020. The SDK allows service providers and enterprises to embed Speedtest capabilities into websites or other services, and Microsoft's integration falls into this application scenario. Speedtest Web SDK is built using JavaScript and provides customizable interfaces and interaction methods, allowing Microsoft to adapt the interface and process to the usage habits of Windows users. Through this underlying solution, when users call the speed test in Windows 11, the actual experience is close to that of visiting the Speedtest official webpage, but the entrance is closer to the system itself, which is conducive to quick use in scenarios such as network troubleshooting.
Overall, as the KB5083769 update is widely rolled out to Windows 11 24H2 and 25H2 users, the built-in Internet speed test feature has transitioned from an early limited testing phase to a fully available state. For users who are accustomed to using the taskbar or quick settings panel for network management, this integration connects the system-level network diagnostic tool with the traditional web version of Speedtest, lowering the testing threshold. In the context of Microsoft continuing to enhance system tools and diagnostic capabilities for Windows 11, this cooperation with Ookla also provides users with a more direct official speed test entrance, which is helpful for basic performance verification and preliminary troubleshooting of problems in home broadband, mobile hotspots and enterprise network environments.
