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. The main trouble is, these patches cause third-party anti-malware software to malfunction, and so the vendors of those products have to rush out their own patches to work with the fixes <http://www.theregister.co.uk/2018/01/08/meltdown_fix_security_problems/>.
This is proving a bit more troublesome than thought <http://www.theregister.co.uk/2018/01/09/meltdown_patch_anti_malware_conflict/>: * Protecting the kernel may break the functionality of some anti-malware products altogether. * Having third parties set a Registry key to tell Windows to activate the kernel protection may have some unintended consequences.