--- title: Windows 11 Insider builds add drive sanitization to... description: New Windows 11 Insider Preview builds across Beta and Experimental channels add drive sanitization to the Cloud rebuild feature so old data is wiped rather... canonical: https://daily.dev/posts/windows-11-insider-builds-add-drive-sanitization-to-cloud-rebuild-plus-responsiveness-improvements-tg8xoh7aw twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Windows 11 Insider builds add drive sanitization to Cloud rebuild, plus responsiveness improvements | daily.dev og:description: New Windows 11 Insider Preview builds across Beta and Experimental channels add drive sanitization to the Cloud rebuild feature so old data is wiped rather... og:url: https://daily.dev/posts/windows-11-insider-builds-add-drive-sanitization-to-cloud-rebuild-plus-responsiveness-improvements-tg8xoh7aw og:image: https://api.daily.dev/og/posts/tg8XOh7aW.png og:image:alt: Windows 11 Insider builds add drive sanitization to Cloud rebuild, plus responsiveness improvements og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Windows 11 Insider builds add drive sanitization to Cloud rebuild, plus responsiveness improvements **[Collections](https://daily.dev/sources/collections)** · 2 min read · 1 upvotes · 0 comments ## Summary New Windows 11 Insider Preview builds across Beta and Experimental channels add drive sanitization to the Cloud rebuild feature so old data is wiped rather than just overwritten, plus remote triggering via the Recovery CSP for IT admins managing devices without physical access. Experimental builds also show noticeably faster system responsiveness, with File Explorer loading nearly instantly; Microsoft confirms Start menu and taskbar speed gains are rolling out more broadly with more expected this fall. Smaller accessibility tweaks include a redesigned, Escape-dismissible mouse cursor animation and a new low-glare contrast theme for Magnifier. ## Content Microsoft is rolling out new Windows 11 Insider Preview builds across Beta and Experimental channels as of September 18, 2026, with a handful of genuinely useful additions buried alongside the usual incremental tweaks. ## Build numbers - Build 26220.9492 (Beta) - Build 26340.9502 (Experimental) - Build 28120.3032 (Experimental 26H1) - Build 29671.1000 (Experimental Future Platforms) ## Cloud rebuild gets drive sanitization and remote triggering The Cloud rebuild feature, which reinstalls Windows and drivers fresh over the internet, now has two new capabilities on the Experimental branch. First, it can sanitize the drive before reinstalling, which means leftover data is wiped rather than just overwritten by the new installation. Second, IT admins can now trigger the process remotely through the Recovery CSP, which is useful for managing devices without physical access. Neither of these is flashy, but drive sanitization in particular addresses a real gap: a standard reinstall doesn't guarantee that old data is unrecoverable. ## System responsiveness improvements Insiders testing the Experimental builds are reporting noticeably faster system responsiveness, with File Explorer loading essentially instantly. Marcus Ash, Microsoft's Design and Research lead for Windows & Devices, confirmed that Start menu and taskbar responsiveness improvements are already rolling out more broadly, with additional gains expected this fall. The improvements are partly informed by feedback from the K2 Insider initiative. This is the kind of thing that's hard to quantify in a changelog but easy to notice day-to-day, so it's worth watching whether it holds up in the general release. ## Accessibility tweaks Two smaller accessibility changes are also included. The mouse cursor animation has been redesigned to be smoother, and it can now be dismissed with the Escape key. Magnifier gets a new low-glare contrast theme as an alternative to color inversion, which should be easier on the eyes for users who rely on high-contrast modes. ## Questions this post answers ### What does drive sanitization do in the Windows 11 Cloud rebuild feature? It wipes leftover data from the drive before Windows and drivers are reinstalled fresh over the internet, rather than simply overwriting it as a standard reinstall does. This closes a gap where old data on a standard reinstall isn't guaranteed to be unrecoverable. The feature is rolling out on the Experimental Insider Preview branch as of build 26340.9502. _Track Windows Insider feature rollouts like this one on daily.dev as IT policies evolve._ ### Can IT admins trigger a Windows 11 Cloud rebuild remotely? Yes, IT admins can now trigger Cloud rebuild remotely through the Recovery CSP in the Experimental Windows 11 Insider Preview builds. This is useful for managing devices without needing physical access to the machine, and it pairs with the new drive sanitization option added in the same builds. _IT admins planning remote device management can follow CSP updates like this on daily.dev._ ### What is causing the faster File Explorer and Start menu responsiveness in Windows 11 Insider builds? Insiders testing Experimental builds report noticeably faster responsiveness, with File Explorer loading almost instantly. Marcus Ash, Microsoft's Design and Research lead for Windows & Devices, confirmed Start menu and taskbar improvements are already rolling out more broadly, partly informed by feedback from the K2 Insider initiative, with more gains expected in the fall. _Anyone tracking Windows performance changes can follow these responsiveness updates on daily.dev._ ## Similar posts on daily.dev - [Announcing new builds for July 6 2026](https://daily.dev/posts/announcing-new-builds-for-july-6-2026-nxl9v9gbg) · Windows Blogs · 5 upvotes · 1 comments - [Microsoft testing new Cloud Rebuild Windows 11 recovery feature](https://daily.dev/posts/microsoft-testing-new-cloud-rebuild-windows-11-recovery-feature-j95v70jxl) · BleepingComputer · 0 upvotes · 0 comments - [Windows quality update: May](https://daily.dev/posts/windows-quality-update-may-z7pnjbqyv) · Windows Blogs · 0 upvotes · 0 comments --- Tags: [#windows](https://daily.dev/tags/windows), [#accessibility](https://daily.dev/tags/accessibility) [View this post on daily.dev](https://daily.dev/posts/windows-11-insider-builds-add-drive-sanitization-to-cloud-rebuild-plus-responsiveness-improvements-tg8xoh7aw) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Windows 11 Insider builds add drive sanitization to Cloud rebuild, plus responsiveness improvements","url":"https://daily.dev/posts/windows-11-insider-builds-add-drive-sanitization-to-cloud-rebuild-plus-responsiveness-improvements-tg8xoh7aw","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/windows-11-insider-builds-add-drive-sanitization-to-cloud-rebuild-plus-responsiveness-improvements-tg8xoh7aw"},"datePublished":"2026-09-18T17:49:06.457Z","dateModified":"2026-09-18T17:49:48.137Z","description":"New Windows 11 Insider Preview builds across Beta and Experimental channels add drive sanitization to the Cloud rebuild feature so old data is wiped rather...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/16d185a3f449899e481f4f8d2c223acb?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/16d185a3f449899e481f4f8d2c223acb?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Collections","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Collections","logo":"https://media.daily.dev/image/upload/s--fk_6ycEi--/f_auto,q_auto/v1780996001/logos/collections?_a=BAMAMiWQ0","url":"https://daily.dev/sources/collections"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/windows-11-insider-builds-add-drive-sanitization-to-cloud-rebuild-plus-responsiveness-improvements-tg8xoh7aw","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"windows,accessibility","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Collections","item":"https://daily.dev/sources/collections"},{"@type":"ListItem","position":3,"name":"Windows 11 Insider builds add drive sanitization to Cloud rebuild, plus responsiveness improvements"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/windows-11-insider-builds-add-drive-sanitization-to-cloud-rebuild-plus-responsiveness-improvements-tg8xoh7aw#faq","mainEntity":[{"@type":"Question","name":"What does drive sanitization do in the Windows 11 Cloud rebuild feature?","acceptedAnswer":{"@type":"Answer","text":"It wipes leftover data from the drive before Windows and drivers are reinstalled fresh over the internet, rather than simply overwriting it as a standard reinstall does. This closes a gap where old data on a standard reinstall isn't guaranteed to be unrecoverable. The feature is rolling out on the Experimental Insider Preview branch as of build 26340.9502. Track Windows Insider feature rollouts like this one on daily.dev as IT policies evolve."}},{"@type":"Question","name":"Can IT admins trigger a Windows 11 Cloud rebuild remotely?","acceptedAnswer":{"@type":"Answer","text":"Yes, IT admins can now trigger Cloud rebuild remotely through the Recovery CSP in the Experimental Windows 11 Insider Preview builds. This is useful for managing devices without needing physical access to the machine, and it pairs with the new drive sanitization option added in the same builds. 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