The recent Meltdown and Spectre CPU vulnerabilities took almost everyone by surprise. Widespread panic was staved off only by the promise of a nearly-ready OS patching fix, which it turned out, excluded a large swath of systems and created its own set of problems.
Users are still scrambling to patch systems with an extremely complex mixture of OS, firmware and application updates. Organizations are encountering slowdowns, blue screens and reboot problems in their rush to avoid security problems. The entire stack of Spectre and Meltdown fixes has not yet been properly tested and will take time to reach anything resembling stability.