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Microsoft confirms April Windows updates cause backup failures
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Microsoft confirms April Windows updates cause backup failures


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Microsoft has confirmed that the April 2026 security updates are causing failures in third-party backup applications using the psmounterex.sys driver.

First seen on bleepingcomputer.com

Jump to article: www.bleepingcomputer.com/news/microsoft/microsoft-confirms-backup-failures-caused-by-vulnerable-driver-block/

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