Microsoft is rolling out two key improvements to the search experience in Windows 11. After actual experience, it is generally believed that Microsoft has finally begun to face up to users' real needs for search functions. The first change is already rolling out to regular users via the May 2026 optional update KB5089573, which Microsoft says will allow the system to "find and prioritize files with just two characters" in the local index. The second improvement is currently available for Windows 11 preview builds Build 26300.8553 and Build 26220.8544. It is called "Search by Substring" and targets the problem of "difficult to search compound file names" that has been troubled for many years.
For example, Microsoft said that files with compound names such as "MeetingNotesApril" and "ProjectStatusReport" can be quickly retrieved in the future by simply entering the middle fragment such as "april" or "status" instead of having to enter it from the beginning of the file name.
For a long time, Windows search has not performed well when dealing with compound file names. Unless the user enters a string that begins with the file name or is very close to it, it is often difficult to get correct results. This has also forced many users to deliberately adjust their naming habits to "accommodate" search engines. In the past, users had to try to write more complete and "regular" file names when searching to reduce the risk of missing results. Now, due to changes in indexing logic, there is no longer a need to repeatedly edit file names for searches. After the new optional update is installed, users only need to enter any two characters, and they will have the opportunity to directly see the target file appear at the top of the search results. For example, entering "XP" can quickly locate Windows XP wallpaper files, while in the old version, the same operation will only display programs such as XPS Viewer first. Before the improvements were enabled, users often had to enter longer keywords like “xp bliss” to “dig” a specific image out of a pile of irrelevant results.
However, due to Microsoft's "Controlled Feature Rollout" mechanism, even if the May optional update is installed, some devices are still unable to experience the above search enhancements and need to wait for the functions to be gradually turned on and off in the background. Similarly, "Search by substring" is currently only available in the Windows Insider trial and beta channel, and Microsoft plans to gradually promote it to all users in the coming months. The reason why we emphasize substring search is because real-life file naming is far from a standardized template. Users often mix months, project names, abbreviations, version numbers, and various temporary marks, making it difficult to accurately remember the beginning of the name in the future. In the test, when the improvements are not enabled, you must remember the beginning part of the file name so that it may appear in the results. However, after the new function is enabled, as long as you enter any fragment such as "May", "Menu", "Comparison", etc., the system can immediately return files such as "StartMenuComparisonMay". This is described as "what search should be like in 2026."
This round of optimization for search is also part of the commitment Microsoft made in its "Our Commitment to Windows Quality" blog in March this year. At that time, the company said it would "make search find important content faster, present apps, files, and settings more clearly, so users can reach the right results quickly." Previously, the outside world also noticed that Microsoft has promised that Windows 11 search will no longer forcibly rank web results before local applications and files in most cases. This is regarded as an end to the long-term joke of "searching Terminal but jumping out of the movie "Terminator" or "Ultimate Code" first." These are urgently needed adjustments, as desktop search has continued to diminish in its role in daily workflow over the past few years.
It’s worth noting that search quality isn’t the only problem with the Windows 11 search experience, with the default interface itself also being criticized for being “overcrowded.” In the long-term iteration process, the search interface has been stuffed with more and more web content, AI tool entrances, hot trends, Microsoft Rewards tips, and Bing linkage components, and these are not things that most users really care about when they open a search. When users open search, they often just want to launch an application, find files, open settings, or quickly complete a calculation, but the interface is used as a promotion platform for Bing. For example, the search interface displays "Picture of the Day" and "Q&A of the Day" by default.
Among these miscellaneous items, "Top Apps" still have some value because they are usually sorted based on personal usage habits, but the AI tools highlighted in the search interface are redundant. The article mentioned that these so-called "AI tools" (such as Create with AI, Search with AI, Image Creator, Video Creators) are not superior to their competitors in terms of experience, but they still occupy a high-profile position in the search interface.
To make matters worse, these recommended components themselves are implemented based on web technology rather than native UI elements. Not only do they jump directly to Bing.com after clicking on them, they are also regarded as "memory killers". Ironically, the “cleanest” official search interface comes from “Ask Copilot” on the taskbar: This feature was first demonstrated in late 2025. Although it has a poor reputation from the outside world, its search interface only has a floating input bar and contains almost no visual noise.
"Ask Copilot" has since been quietly removed from previews, and was silent for a while until a Microsoft document for "frontier enterprises" was recently exposed, suggesting that this feature will return to the Windows 11 taskbar in mid-2026. This proves that Microsoft is actually fully capable of creating a simple, fast, and intuitive search experience, but it has previously chosen to serve as the entrance to Bing and various online services in terms of product strategy. At the same time, Microsoft is also fixing the "roughness" of other interface levels in Windows 11. For example, in December 2025, the height and proportions of the search interface were readjusted to match the redesigned Start menu, resolving the "half-finished feel" caused by the inconsistency in size between the two.