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    KB5083769 Blocks psmounterex.sys: Windows 11 Backup Image Mounting Fails

    Microsoft says Windows updates released on or after April 14, 2026, for Windows 11 and supported Windows versions are intentionally blocking vulnerable psmounterex.sys kernel drivers, causing some third-party backup applications to fail when mounting or managing disk images rather than exposing...
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    • backup software kernel driver blocking patch tuesday windows 11 updates
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    • Forum: Windows News
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