Microsoft Releases KB5131096 for Windows 10
The cumulative update covers Extended Security Updates users on versions 22H2 and 21H2 and includes a PowerShell signing change.
Updated on Nov. 10, 2026 in Computers
Microsoft released cumulative update KB5131096 during the November 2026 Patch Tuesday for Windows 10 versions 22H2 and 21H2, available to Extended Security Updates users. The update raises OS build numbers to 19045.7846 and 19044.7846 and is available through Settings > Windows Update and the Microsoft Update Catalog.
Why it matters
The update strengthens validation of PowerShell script signing, which can cause affected scripts to fail signature checks if they lack valid UTF-8 encoding. It also addresses a printer-adding error 87 introduced in October 2026 and adjusts Cuba's daylight saving time rules for 2026-2027.
The update sets OS build numbers to 19045.7846 for version 22H2 and 19044.7846 for version 21H2, according to Microsoft's release information. Some USB Audio Class 1.0 devices that failed after the September 8, 2026 update remain only partially resolved, and Microsoft has not said when a full fix will arrive.
The players
Microsoft
Microsoft is the technology company that develops the Windows operating system and distributes its security and cumulative updates.
The details
KB5131096 fixes a printer-adding issue, error 87, that appeared after the October 2026 update. Scripts saved without valid UTF-8 encoding and byte order mark may fail signature validation and must be re-saved and re-signed.
Timeline
September 8, 2026: A Windows security update preceded USB audio device failures.
September 14, 2026: An out-of-band update partially resolved the USB audio issue.
October 2026: An update introduced the printer error 87 issue.
November 2026: KB5131096 was released during Patch Tuesday.
March 2027: Cuba's daylight saving time transition is not observed under the update.
The Tech Race
KB5131096 continues a pattern of Windows 10 cumulative updates that patch regressions from earlier releases, following the September 14, 2026 out-of-band fix for USB Audio Class 1.0 devices. The update leaves some of those USB audio symptoms unresolved, extending the troubleshooting cycle for Extended Security Updates customers.
Windows 10 Extended Security Updates users on versions 22H2 and 21H2 can get KB5131096 through Settings > Windows Update or the Microsoft Update Catalog. Anyone who writes PowerShell scripts should check that those files use UTF-8 with a byte order mark, since unsigned or badly encoded scripts may fail after this update.
The takeaway
Administrators should verify PowerShell script encoding before installing KB5131096 and test USB audio devices afterward, since some symptoms remain unresolved. Keeping a rollback plan ready helps if device problems persist.
Further reading
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