On Tue, 9 Jan 2018 13:50:30 +1300, I wrote:
Microsoft is having a tough time coming out with good patches for the Spectre and Meltdown vulnerabilities.
It appears the company has got a more reliable patch now. However <https://arstechnica.com/gadgets/2018/01/good-newsbad-news-in-quest-to-get-meltdown-and-spectre-patched/>, If you're unfortunate enough to have installed the previous, bad update and now have a system that crashes on startup, you'll still have to roll back the bad update before you can install the new one. We've read reports that this is indeed possible, but unfortunately, Microsoft only offers generic guidance on troubleshooting blue screen of death crashes, not any specific steps to fix this specific issue.