Owners of an AMD processor, who use Windows as their operating system, complain on Microsoft’s support forums that their system doesn’t start anymore after applying the Meltdown and Spectre patch. Even reinstalling Windows doesn’t appear to solve the issue. Both Windows 7 and Windows 10 are affected.
The Microsoft forum has several threads of users who complain that their system doesn’t start anymore after the patch. They only see the Windows logo after which the computer appears to be stuck. Mainly users with older AMD processors, like Athlon, Opteron, Sempron and Turion appear to be affected.
Forum user eftgyhju has posted an overview of the issues and a workaround the involves uninstalling KB4056892 through the Recovery Console. Update KB4056892 should patch the Meltdown and Spectre vulnerabilities. Although AMD processors are only vulnerable to the Spectre attack, it seems Microsoft also ships the Meltdown patches to AMD users.