Forum Discussion

Copper Contributor

Aug 25, 2026

Error 0x426-0x0 from KB5094126 — 3 months unresolved — ACCC & Fair Trading complaints filed

I am a Microsoft 365 Business subscriber experiencing persistent error 0x426-0x0 since June 2026 following Windows Update KB5094126 which broke OLE Automation functionality — confirmed by Microsoft's...

MVP

Aug 28, 2026

Seems Microsoft has acknowledged the regression but has not yet delivered a permanent fix in cumulative updates.

https://support.microsoft.com/en-us/servicing/os/windows-11/2026/06/june-9-2026-kb5094126-os-builds-26200-8655-and-26100-8655

https://cloudhousetechnologies.com/blog/windows-11-kb5094126-ole-automation-office-apps-not-opening-fix-2026