Patch intelligence record
Windows 11 25H2 (Build 26200.8894)
Current reports mention display regression, update/install failure, and unspecified windows issue. 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 display regression in display / graphics, update/install failure in windows update, unspecified windows issue in Windows workflow.
Too few reports for a firm verdict yet — treat this as early evidence.
- Accepted reports
- 7
- Latest evidence run
- Oct 6, 2026
- Healthy sources
- 2 fresh (success / no reports) · need 2
- Microsoft Q&A (search) Completed 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 26200.8894 (KB5121767). Released 2026-07-18 on the General Availability Channel. Update type 2026-07 OOB. 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 26200.8894 (KB5121767). Released 2026-07-18 on the General Availability Channel. Update type 2026-07 OOB. 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
- Jul 18, 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 (7)
User report sources used for the current read.
- Microsoft Learn Q&A. (2026, August 5). Azure Virtual Desktop: External identity sign-in via Windows App fails when switching to resource tenant - error 0x8AA5015A - Microsoft Q&A. microsoft learn qna Issue: unspecified windows issue in Windows workflow Workflow: Windows workflow
- Microsoft Learn Q&A. (2026, July 28). OS Build 26200.8894 Office Errors - Major Headache Part 2 - Microsoft Q&A. microsoft learn qna Issue: display regression in display / graphics Workflow: display / graphics
- Microsoft Learn Q&A. (2026, July 24). OS Build 26200.8894 Office Errors - Major Headache - Microsoft Q&A. microsoft learn qna Issue: display regression in display / graphics Workflow: display / graphics
- Microsoft Learn Q&A. (2026, August 6). [Regression][Mixed DPI] Classic Win32 checkbox renders incorrectly after Windows 11 24H2/25H2 update (build 26200.8875+) - Microsoft Q&A. microsoft learn qna Issue: update/install failure in windows update Workflow: windows update
- Microsoft Learn Q&A. (2026, August 3). Windows 11 25H2 (26200.8894) – Loss of Outlook/OneDrive/Windows Update authentication after July update - Microsoft Q&A. microsoft learn qna Issue: update/install failure in windows update Workflow: windows update
- Microsoft Learn Q&A. (2026, September 8). After update OS to 26200.8894 suffer below issue - Microsoft Q&A. microsoft learn qna Issue: display regression in display / graphics Workflow: display / graphics
- Microsoft Learn Q&A. (2026, October 1). Windows Core Audio (PKEY_AudioEndpoint_StableId): StableId changed after update of custom USB audio driver, what determines its stability? - Microsoft Q&A. microsoft learn qna Issue: audio regression Workflow: audio
Official sources
- Microsoft. (2026, July 18). Windows 11 release information.release health
- Microsoft. (2026, July 18). Windows release health.release health
- Microsoft. Download page.download