OS SecurityBleeping Computer
4.0 — MEDIUM
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. [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
A known issue with the April KB5083769 Windows 11 update causes third-party backup applications to fail due to a VSS service timeout, affecting systems running Windows 11 24H2 and 25H2.
⚙️Technical Details
Affected Systems
Windows 11 24H2 and 25H2
Attack Vectors
VSS (Volume Shadow Copy Service) snapshots
💥Impact Assessment
Severity: medium
Who Is at Risk
Users of third-party backup applications using VSS snapshots on systems running Windows 11 24H2 and 25H2
🛡️Recommended Actions
1Uninstall the problematic KB5083769 update from Settings > Windows Update > Update history > Related settings > Uninstall updates, then pause Windows updates and reboot the system.
2Monitor backup software for failures due to VSS service timeouts.
3Apply a temporary workaround by pausing Windows updates until further updates are available.
📦Affected Products
Acronis Cyber Protect CloudMacrium ReflectNinjaOne BackupUrBackup Server
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