vss snapshots

  1. April 2026 Windows Update Blocks psmounterex.sys, Breaking Backup Mounting

    Microsoft’s April 2026 Windows security update adds the third-party psmounterex.sys kernel driver to the Microsoft Vulnerable Driver Blocklist, causing backup-image mounting and some VSS snapshot workflows to fail on affected Windows 10, Windows 11, and Windows Server systems. The breakage is...
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    • backup recovery vss snapshots vulnerable driver blocklist windows security update
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    • Forum: Windows News