Microsoft shipped Windows 11 Insider Preview Build 26220.8575 to the Beta Channel on June 8, 2026, packing a punch of practical fixes for nagging issues that have frustrated testers. Audio failures, Settings instability, Search freezes, and a puzzling Notepad freeze headline this cumulative update, alongside a long-awaited correction for the Windows Update pause feature.

Beta Channel Insiders who have been grappling with sudden audio dropouts or crackling sound across multiple apps now have reason to celebrate. This build directly addresses an audio processing bug that could completely silence system audio after waking from sleep or switching output devices. Early adopters are already chiming in on the Feedback Hub to confirm that their Bluetooth headsets and external DACs are once again playing nice with Windows 11.

The Settings app, which had developed a nasty habit of crashing when users navigated between Bluetooth, Display, or Windows Update sections, also gets a reliability overhaul in Build 26220.8575. Microsoft’s engineers traced the culprit to a memory leak triggered by the new dynamic theme-aware icons introduced in earlier 26xxx builds. The fix not only prevents Settings from consuming an extra 2 GB of RAM over a few hours but also slashes the launch time to under a second on NVMe drives.

Search enthusiasts who rely on the revamped semantic indexing will be relieved that the sporadic freeze when typing queries in the taskbar has been squashed. The issue, which often required a file explorer restart, was linked to a deadlock condition between the Windows Search indexer and the 3D Emoji picker. The same update also smooths over a comparable freeze that struck Notepad whenever users invoked the Ctrl+F find dialog on large UTF-8 files.

Perhaps the most welcome fix, though, is the restoration of the “Pause updates” toggle. After weeks of being grayed out for Beta Channel users, the feature now works as intended, allowing you to pause feature updates for up to 35 days and quality updates for 7 days. This regression was introduced by a servicing stack misconfiguration in Build 26200, and its resolution means users can again control their update cadence without resorting to registry hacks or wushowhide.

Audio fixes: from crackle to clarity

Build 26220.8575’s release notes list over a dozen audio-related commits. The most impactful is a refactored WasapiOutputNode that eliminates the buffer underrun causing random crackles during high-DPC latency scenarios. If you’ve been hearing pops when your CPU ramps up while compiling code or rendering video, this is the fix you’ve been waiting for.

Additionally, the Spatial Audio endpoint is no longer duplicated after a fast user switch, which previously confused applications like Dolby Access and DTS Sound Unbound. For USB audio interfaces, Microsoft corrected a sample-rate negotiation bug that forced many Focusrite and PreSonus devices into 16-bit/44.1 kHz mode, ignoring their full 24-bit/192 kHz capability.

Bluetooth audio got some love too. The HandsFree profile now properly reports battery level for devices that support the Bluetooth 5.3 Battery Service, and quick reconnect times after out-of-range incidents have improved by roughly 40% on Intel AX211 adapters.

Settings app: stability and speed

The Settings app overhaul in Build 26220.8575 isn't just about stopping crashes; it's about making the interface feel snappier. The memory leak tied to icon rendering meant that after an hour of switching between pages, the app would balloon to 2.3 GB of committed memory—on a 16 GB system, that’s a quick path to the recycle bin. The fix uses a smarter caching mechanism that reuses SVG resources instead of spawning new instances on every navigation.

As part of the same push, the Windows Update page no longer hangs for 30 seconds when checking for updates on metered connections. And If you’ve ever been frustrated by the “Find my device” toggle inexplicably turning itself off, that’s been traced to a race condition with the Location services enumeration and is now resolved.

Insiders who rely on the new RGB lighting controls in Settings will notice that the per-device brightness slider no longer resets to 100% after a reboot. Corsair iCUE and Razer Synapse fans can breathe easier.

Search and Notepad: unfreeze your flow

Windows Search indexed over 500,000 items in a typical developer environment, and the deadlock inside the indexer’s interactions with the emoji panel made the combined stack a house of cards. The root cause was a priority inversion: the UI thread of SearchHost waited on a mutex held by the TextInputHost, which in turn waited for the indexer to return results—classic deadlock. The fix divides the shared resource into two independent synchronization objects, allowing the emoji panel and search suggestions to coexist peacefully.

Notepad’s freeze was less dramatic but equally annoying. When opening a 200 MB log file and pressing Ctrl+F, the edit control’s regex engine would re-evaluate the entire document for every character typed in the find box. Now, the search uses incremental matching and caches its last state, cutting the response time from several seconds to under 100 ms even on spinning rust.

Update pause: taking back control

The “Pause updates” regression is a prime example of how a single missing registry key can cascade. Build 26200 inadvertently removed the AllowUpdatePause value under HKLM\SOFTWARE\Microsoft\WindowsUpdate\UX\Settings, causing Windows Update to ignore any pause timer set via the UI or Group Policy. Although a quick PowerShell script could restore the key, many Insiders simply got stuck with unwanted downloads. Build 26220.8575 delivers the proper servicing stack update that re-introduces the correct registry permissions and default policy.

With the fix, navigating to Settings > Windows Update > Pause updates will now show the familiar dropdowns, and you can schedule a pause that aligns with your workflow—be it a presentation or a multi-day rendering job.

How to get the build

If you’re already enrolled in the Beta Channel, head to Settings > Windows Update and click Check for updates. Build 26220.8575 will show up as Cumulative Update for Windows 11 Insider Preview (10.0.26220.8575) (KB5040442). The update weighs roughly 750 MB for x64 systems and requires a reboot.

New to the Insider program? You can join by going to Settings > Windows Update > Windows Insider Program and linking your Microsoft account. Choose the Beta Channel for more polished builds that track the next Feature Update—in this case, the Windows 11 2026 Update (code-named Hudson Valley).

Known issues and workarounds

Even with this string of fixes, a few known issues remain in Build 26220.8575:

  • Copilot+ PCs with Snapdragon X Elite: The webcam may fail to initialize after hibernate, requiring a cold boot. A firmware update from Qualcomm is expected alongside the next mainline build.
  • Widgets board: Custom feeds may still revert to the US default after a machine restart. To mitigate this, pin your preferred interests through the Widget settings (Win + W) before rebooting.
  • Sudo for Windows: Command-line elevation via sudo inside Windows Terminal may return “Error 1314” when the execution policy is set to Restricted. Run Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy RemoteSigned in PowerShell to unlock it.
  • Windows Subsystem for Android: The Amazon Appstore might fail to launch. Microsoft advises purging the cache via Settings > Apps > Amazon Appstore > Storage > Clear data.

What Insiders are saying

Discussion threads on the Windows Insider subreddit and X (formerly Twitter) show mixed but trending-positive sentiment. User u\BetaTester2026 reported a 12-hour stress test with no audio glitches, while several professionals noted that the Settings app now stays open during the entire workday without needing a task kill. The Search fix drew particular praise from data analysts who juggle multiple file types; one commenter wrote, “First time in three weeks I haven’t had to restart SearchHost after every reboot.”

However, a vocal minority points out that the new audio stack seems to introduce a 50 ms latency penalty on ASIO drivers, which could be a deal-breaker for music producers. The known issues list doesn’t mention this, but a Microsoft engineer acknowledged the report on the Feedback Hub and promised a follow-up servicing update before the end of June.

The bigger picture

Build 26220.8575 is part of the 26xxx series, which lays the groundwork for the Windows 11 2026 Update. These Beta Channel builds are feature-complete for the next release; Microsoft is now in the stabilization phase, focusing on quality and reliability. The fixes included here are expected to roll into the Release Preview Channel within two weeks, provided no showstopper regressions emerge.

For business users, the update cadence management fix is particularly significant. With the return of the Pause updates toggle, IT admins can again rely on the native Windows Update for Business deferral policies without having to craft complex Configuration Manager rules as a temporary workaround.

Insiders should pay close attention to the audio and Settings improvements—these subsystems have been in flux since the introduction of the new WinUI 3 components, and every polishing step brings them closer to RTM quality.

The clock is ticking toward the general availability of the 2026 Update, rumored for late September. If Build 26220.8575 is any indication, Microsoft is determined to deliver a release that is stable, performant, and free of the upgrade headaches that marred the original Windows 11 launch. For now, Beta Channel Insiders can enjoy a quieter, snappier, and more predictable build that makes the day-to-day just a little bit easier.