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Microsoft's latest security update has ruined dual-boot Windows and Linux PCs


The update wasn’t supposed to reach dual-boot PCs.

The software giant issued a security patch last week to fix a two-year-old vulnerability in the GRUB open-source boot loader used by lots of Linux devices. Microsoft’s patch wasn’t supposed to hit dual-boot devices, but many have found it has and it’s now stopping their Linux installs from booting properly. Ars Technica reports that multiple Linux dual-boot users are seeing “security policy violation” messages, along with “something has gone seriously wrong” errors.

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“Something has gone seriously wrong,” dual-boot systems warn after MS update