Anybody out there can tell me what this is supposed to mean ?

Noticed that after Windows is fully running, the monitor switches off and after a few seconds on again.

Below entry is about 25 minutes after booting the pc and Windows running idle.

Logged: 12-11-2015 13:00:30
The process Explorer.EXE has initiated the shutdown of computer DESKTOP-ZZZZZZZ on behalf of user DESKTOP-ZZZZZZZ\username for the following reason: Other (Planned)
Reason Code: 0x80000000
Shut-down Type: shutdown
Source: User32
Event ID: 1074
Level: Information

followed by 4 entries
Logged: 12-11-2015 13:00:31
The Sync Host_Session2 service terminated unexpectedly. It has done this 1 time(s). The following corrective action will be taken in 10000 milliseconds: Restart the service.
Source: Service Control Manager
Event ID: 7031
Level: Error