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Last MP log entry is 6:51 - above error message in the event log is from 6:55, so that's weird. The PC was definitely still running at 6:55 or it would not have logged anything, however, MP logging did not continue after 6:51:40. The application event log shows entries at 6:57.

The Home Server connection is established at 6:55, event logging continues until 6:57 when you probably restarted the PC. MYSQL is not available before 6:55. However, your log shows entries as of 6:38, at which time MP tries to enter standby:

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[2016-06-30 06:38:43,408] [Log  ] [MPMain  ] [INFO ] - TVHome.WndProc(): Windows is suspending

[2016-06-30 06:38:43,408] [Log  ] [MPMain  ] [DEBUG] - TVHome.OnSuspend()

[2016-06-30 06:38:43,408] [Log  ] [MPMain  ] [INFO ] - TvNotify: stop

[2016-06-30 06:38:43,418] [Log  ] [MPMain  ] [DEBUG] - PS: SUSPEND

[2016-06-30 06:38:43,418] [Log  ] [MPMain  ] [DEBUG] - PS: System is going to suspend

[2016-06-30 06:38:43,418] [Log  ] [MPMain  ] [DEBUG] - PS: Signal "Suspend" to StandbyWakeupThread

[2016-06-30 06:38:43,418] [Log  ] [PS StandbyWakeup] [DEBUG] - PS: StandbyWakeupThread suspended

[2016-06-30 06:38:43,618] [Log  ] [MPMain  ] [DEBUG] - PS: Unregister handlers with tvservice with tag 4

[2016-06-30 06:38:43,618] [Log  ] [MPMain  ] [DEBUG] - PS: Resetting TVServer RemoteControl interface

[2016-06-30 06:38:43,618] [Log  ] [MPMain  ] [DEBUG] - PS: Run external command

[2016-06-30 06:38:43,618] [Log  ] [MPMain  ] [DEBUG] - PS: Send "EnteringStandby" event

[2016-06-30 06:38:43,618] [Log  ] [MPMain  ] [DEBUG] - Main: OnSuspend - stopping playback

[2016-06-30 06:38:43,618] [Log  ] [MPMain  ] [DEBUG] - Main: SaveLastActiveModule - enabled True

[2016-06-30 06:38:43,618] [Log  ] [MPMain  ] [INFO ] - Main: WM_POWERBROADCAST (PBT_POWERSETTINGCHANGE)

[2016-06-30 06:38:43,618] [Log  ] [MPMain  ] [INFO ] - Main: The display is off

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The I can see a USB disk error, which I don't really understand

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[2016-06-30 06:38:43,638] [Error  ] [MPMain  ] [ERROR] - Utils: GetUsbHardDisks Error: Eine Schnittstelle, die für einen anderen Thread marshalled war, wurde von der Anwendung aufgerufen.

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The system is then suspended:

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[2016-06-30 06:38:47,814] [Log  ] [43  ] [DEBUG] - [WIFI_REMOTE]  Network lost, stopping server

[2016-06-30 06:38:47,814] [Log  ] [43  ] [INFO ] - [WIFI_REMOTE]  SocketServer stopped.

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... and immediately reactivated:

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[2016-06-30 06:38:48,641] [Log  ] [MPMain  ] [INFO ] - MiniDisplay: Resume from Suspend or Hibernation detected, starting plugin

I suggest that you repeat your testing with Watchdog and non-core plugins disabled.

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