Patch intelligence record
Windows 11 25H2 (Build 26200.8524)
Current reports mention update/install failure, bsod / stop error, and crash or hang. This page covers one cumulative update, not the whole 25H2 servicing train; reports about a later update are counted on that update's own page.
Recommendations
- Pause updates if this machine is doing deadline-sensitive or production work.
- Check Microsoft's known-issue and safeguard-hold list for this KB before installing.
- Keep the uninstall path in mind: a cumulative update can be removed from Settings > Windows Update > Update history for a limited window after installation.
Current reports mention update/install failure in windows update, bsod / stop error in system stability, crash or hang in system stability.
- Accepted reports
- 9
- Latest evidence run
- Oct 6, 2026
- Healthy sources
- 2 fresh (success / no reports) · need 2
- Microsoft Q&A (search) Checked — no reports found last checked Oct 6, 2026
- techcommunity windows sitemap Checked — no reports found last checked Oct 6, 2026
Monitoring reflects community-evidence collection health for this exact release — an absence of reports is not a safety guarantee, and this is separate from the AUXSAYS verdict.
Vendor Known Issues — No vendor-known issue data captured for this patch.
AUXSAYS has not captured official issue data for this patch. This does not indicate the vendor has no issues. Not counted as community reports.
Official Patch Notes — vendor release notes captured from the official source
Windows 11 25H2 cumulative update, OS build 26200.8524 (KB5089573). Released 2026-05-26 on the General Availability Channel. Update type 2026-05 D. This is the official Microsoft Windows release-health entry (learn.microsoft.com/windows/release-health). Known-issue and safeguard-hold details are published on the per-version Windows release-health status page.
Windows 11 in these notes: .
Windows 11 25H2 cumulative update, OS build 26200.8524 (KB5089573). Released 2026-05-26 on the General Availability Channel. Update type 2026-05 D. This is the official Microsoft Windows release-health entry (learn.microsoft.com/windows/release-health). Known-issue and safeguard-hold details are published on the per-version Windows release-health status page.
Technical Details
- Released
- May 26, 2026
- File size
- Official source checked
- Oct 6, 2026
- Official notes checked
- Oct 6, 2026
Checksum
Use these hashes to verify downloaded installers match the files published with the official release.
User Reports / Sources (9)
User report sources used for the current read.
- Microsoft Learn Q&A. (2026, July 29). 2026-05 Preview Update appears to break Excel - Microsoft Q&A. microsoft learn qna Issue: crash or hang in system stability Workflow: system stability
- Microsoft Learn Q&A. (2026, June 11). Windows 11 25H2 | (KB5089573) (26200.8524 | Causing BSOD Hypervisor error 0x20001 - Microsoft Q&A. microsoft learn qna Issue: bsod / stop error in system stability Workflow: system stability
- Microsoft Learn Q&A. (2026, June 10). Laptop crashes after KB5089573 (26200.8524) - Microsoft Q&A. microsoft learn qna Issue: network regression in networking Workflow: networking
- Microsoft Learn Q&A. (2026, June 8). 2026-05 Preview Update (KB5089573) (26200.8524) downloads when my PC reboots I get a message stating something went wrong - Microsoft Q&A. microsoft learn qna Issue: unspecified windows issue in Windows workflow Workflow: Windows workflow
- Microsoft Learn Q&A. (2026, May 31). Having issues with Keyboard keystroke delay , how do i fix this? - Microsoft Q&A. microsoft learn qna Issue: update/install failure in windows update Workflow: windows update
- Microsoft Learn Q&A. (2026, June 9). Reproducible HYPERVISOR_ERROR BSOD on Windows 11 build 26200.8524 - intelppm!HvRequestIdle - Microsoft Q&A. microsoft learn qna Issue: bsod / stop error in system stability Workflow: system stability
- Microsoft Learn Q&A. (2026, June 1). Activation lost after Reinstalling Windows 11 - Microsoft Q&A. microsoft learn qna Issue: update/install failure in windows update Workflow: windows update
- Microsoft Learn Q&A. (2026, June 1). Microsoft Windows 11 25H2 (OS Build 26200.8524) start menu not updating after installing applications. - Microsoft Q&A. microsoft learn qna Issue: update/install failure in windows update Workflow: windows update
- Microsoft Tech Community. (2026, May 29). KB5089573 forced install + Lenovo network stack degradation (HTTPS latency, build 26200.8524). microsoft tech community Issue: update/install failure in windows update Workflow: windows update
Official sources
- Microsoft. (2026, May 26). Windows 11 release information.release health
- Microsoft. (2026, May 26). Windows release health.release health
- Microsoft. Download page.download