Antivirus makers Sophos and Avast are warning users that installing a recent Windows update may cause their PCs to lock up or fail to boot.
In notices filed Monday, Avast reported that older machines running Windows 7 or Windows 8.1 are becoming locked or frozen on startup after certain Microsoft Windows updates are applied: KB4493472, KB4493448, KB4493467, and KB4493446. Sophos also identified the same patches were at the root of some computers failing to boot when running Sophos’ own software. Sophos identified patches specific to Windows Server as well.
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