April KB5083769 Windows 11 update causes backup software failures
ID: 49f5d41d-9534-539d-b499-de4bd9450789
STIX ID: report--49f5d41d-9534-539d-b499-de4bd9450789
Feed Name: Bleeping Computer
Threat Score
Microsoft’s April 2026 security update KB5083769 is causing VSS snapshot timeouts on Windows 11 (24H2/25H2), breaking third-party backup products from multiple vendors (Acronis, Macrium, NinjaOne, UrBackup); vendors and users report failed backups with VSS timeout errors, and the current mitigation is to uninstall the update and pause updates pending a fix from Microsoft.
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