Okay, I may have found a culprit. It appears before Kernel-General and Kernel-Boot (both of which tell me that the system had just booted up). The source is called UserPowerModeService.
The first one restart had these:
Code:
Process C:\Windows\SysWOW64\powercfg.exe (process ID:4564) reset policy scheme from {8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c} to {8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c
and another one after it
Code:
Process C:\Windows\SysWOW64\powercfg.exe (process ID:8768) reset policy scheme from {8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c} to {8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c}
Though the first restart didn't occur right after the those events. After 4 hours, the system seems to have booted up on its own with
Code:
The operating system started at system time 2015-06-04T19:45:41.495126700Z.
The second restart had these before it:
Code:
Process C:\Windows\SysWOW64\powercfg.exe (process ID:8388) reset policy scheme from {8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c} to {8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c}
then
Code:
Process C:\Windows\SysWOW64\powercfg.exe (process ID:908) reset policy scheme from {8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c} to {8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c}
After 2 hours it restarts on its own again.