April KB5083769 Windows 11 update causes backup software failures
The April 2026 KB5083769 security update breaks third-party backup applications from multiple vendors on systems running Windows 11 24H2 and 25H2. [...]
The April 2026 KB5083769 security update breaks third-party backup applications from multiple vendors on systems running Windows 11 24H2 and 25H2.
According to user reports, first spotted by Microsoft MVP Susan Bradley, this issue affects software using VSS (Volume Shadow Copy Service) snapshots and causes failures due to a VSS service timeout.
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