https://www.cnbc.com/2018/01/18/intel-patches-are-causing-computers-to-randomly-restart.html

Intel confirmed late on Wednesday that its patches to fix processors affected by the Spectre and Meltdown security exploits are causing computers to suddenly reboot on their own.

Intel originally noted this on Jan. 11 when it said users had reported random reboots on systems that are powered by Intel Broadwell and Haswell processors. Now, Intel says its internal testing confirms the reboots also impacts systems powered by its newer Ivy Bridge, Sandy Bridge, Skylake and Kaby Lake chips.