http://www.pcgamer.com/intels-meltdown-and-spectre-patches-are-causing-reboot-issues-in-older-chips/

As if dealing with Meltdown and Spectre wasn't enough of a mess already, Intel has revealed that its firmware updates are causing problems on some older PCs.

"We have received reports from a few customers of higher system reboots after applying firmware updates. Specifically, these systems are running Intel Broadwell and Haswell CPUs for both client and data center. We are working quickly with these customers to understand, diagnose and address this reboot issue," Intel said.