Windows 11 KB5083769 is breaking Acronis, Macrium, and other backup apps

Windows 11 KB5083769 is breaking Acronis, Macrium, and other backup apps Windows 11’s April 2026 cumulative update KB5083769 is breaking third-party backup applications on systems running 24H2 and 25H2, and Microsoft has now confirmed why. The update adds known vulnerable kernel drivers to the Microsoft vulnerable driver blocklist, and one of the affected drivers sits
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