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

Microsoft’s latest monthly security update is wreaking havoc on dual-boot Windows and Linux systems. 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. There are reports of issues across Reddit, Ubuntu forums, and elsewhere. Distributions including Ubuntu, Debian, Linux Mint, Zorin OS, and Puppy Linux have all been affected…

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