Windows 11 26H2 reached general availability on Sept. 29, 2026. Its known-issue list can change; use the current Microsoft status page to verify any problem against your exact build and device.
Protect your files first
Back up important files when possible. If the drive is encrypted, locate the BitLocker recovery key before recovery changes. Stop if storage appears to be failing or this is a work or school managed PC.
Check whether the issue applies
Run winver and record the full OS build. Read the affected-platform, originating-update, status, and workaround fields in Microsoft’s 26H2 release-health page. Do not apply a workaround for a different version or device.
If the issue is not listed
Use the exact code and symptom to investigate. A missing issue entry does not prove that the device is healthy, and a code alone does not prove that a current update caused it.
Keep track of your checks
This checklist stays in this browser session. It is not sent to WinErrors.