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Microsoft confirms April Windows updates cause backup failures - BleepingComputer

Reported by Sergiu Gatlan | May 4, 2026, 10:40 am

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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.

Microsoft has confirmed that the April 2026 security updates are causing failures in third-party backup applications using the psmounterex.sys driver.
As BleepinComputer reported last week, this iss…

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