My windows 8.1 laptop wakes unexpectedly from sleep

Greetings.

I've clean installed windows 8.1 pro vl x64 in my laptop (Windows Media Center is not installed of course).
and activated successfully with KMSmicro 5.0.1.
Windows is fully updated.


I have this problem:
it wakes unexpectedly from sleep at either 04:00 or 05:00 at night.

I check in the Event Viewer and the first entries after the wake are always, eg.:

Code:

Event: Kernel-General
Description:
The system time has changed to ‎2013‎-‎11‎-‎24T03:19:07.500000000Z from ‎2013‎-‎11‎-‎24T00:19:12.031510800Z.
Change Reason: System time synchronized with the hardware clock.

Code:

Event: BTHUSB
Description:
Windows cannot store Bluetooth authentication codes (link keys) on the local adapter. Bluetooth keyboards might not work in the system BIOS during startup.

and

Code:

Event: Power-Troubleshooter
The system has returned from a low power state.

Sleep Time: ‎2013‎-‎11‎-‎24T00:19:02.334201600Z
Wake Time: ‎2013‎-‎11‎-‎24T03:19:09.179443500Z

Wake Source: Unknown

The following is what I've tried so far based on these two links:

Spoiler

superuser.com/questions/494235/how-can-i-prevent-my-computer-from-waking-up-accidentally
support.microsoft.com/kb/2799178

1a. Go to Device Manager
Select each keyboard and mouse device and right-click Properties
Go to the Power Management tab and untick "Allow this device to wake the computer".

1b. Doublechecked the above for my onboard ethernet network card

2. Checked in Task Scheduler and no active task is set to allow to "wake the computer to run this task" having such launch time.

3. Checked in Automatic Maintanance
and "Allow scheduled maintenance to wake up my computer at the scheduled time" is disabled.

4. Ran cmd as admin, and:

Code:

C:\Windows\system32>powercfg /lastwake
Wake History Count - 1
Wake History [0]
  Wake Source Count - 0

C:\Windows\system32>powercfg /waketimers
There are no active wake timers in the system.

C:\Windows\system32>powercfg /devicequery wake_armed
NONE

C:\Windows\system32>powercfg /waketimers
There are no active wake timers in the system.
NONE

5. checked in Power Options>change plan settings>change advanced power settings
and the "Allow wake timers"
is disabled for both On Battery and Plugged in.

6. There's no relevant setting in the BIOS.




Can't think of anything else to check.
Please help.

 

It stays awake.

Also, I have the setting:
Power Options>change plan settings>change advanced power settings>Sleep>Allow hybrid sleep>Plugged in
enabled,
but even if disabled,
the problem still occurs.


Something more:
previously, when I had windows 8 x64,
activated via KMS+WMC free key
I didn't have this problem.

 

I finally found it: it's not a bug, it's a feature...

The laptop would always wake in order to go from sleep to hibernate, after exactly 3 hours(180 mins) of sleep,
but if the laptop at wake would not remain idle (eg. because utorrent was running)
then it would stay awake....



More info:
The wake was happening exactly 3 hours after the sleep(=by closing the laptop lid).

As "wake reason" in the event viewer
it was most of the times "Unknown" (as in my first post) or "S4 Doze to Hibernate" as eg. today.

But, the last 3 entries in Event Viewer when I closed the lid were always these:
(see the "sleep state transition (S4)" at the 2nd entry? )

Code:

Event: Kernel-Power
Description:
The system is entering sleep.
Sleep Reason: Button or Lid



Event: Kernel-Power
Description:
The system firmware has changed the processor's memory type range registers (MTRRs) across a sleep state transition (S4). This can result in reduced resume performance.



Event: Kernel-General
Description:
The system time has changed to ‎2013‎-‎11‎-‎28T02:49:57.500000000Z from ‎2013‎-‎11‎-‎27T23:49:59.822266800Z.
Change Reason: System time synchronized with the hardware clock.

So, I quote from windowsforum.com/threads/s4-doze-to-hibernation.27722/#post-156208
With bold is the solution:

I hope my post will help others having the same issue