I put my HP Pavilion g7 notebook in either sleep or hibernate mode but during the night it wakes itself up with the following event:

Log Name:      System
Source:        Microsoft-Windows-Kernel-General
Event ID:      1
Task Category: None
Level:         Information
Keywords:      Time
User:          N/A
Description:
The system time has changed to 2015-03-02T13:35:06.500000000Z from 2015-03-02T03:53:18.250703900Z.

Change Reason: System time synchronized with the hardware clock.
Event Xml:
  <System>
    <Provider Name="Microsoft-Windows-Kernel-General" Guid="{A68CA8B7-004F-D7B6-A698-07E2DE0F1F5D}" />
    <EventID>1</EventID>
    <Version>1</Version>
    <Level>4</Level>
    <Task>0</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8000000000000010</Keywords>
    <TimeCreated SystemTime="2015-03-02T13:35:06.499591800Z" />
    <EventRecordID>42418</EventRecordID>
    <Correlation />
    <Execution ProcessID="4" ThreadID="4260" />
    <Channel>System</Channel>
    <Security />
  </System>
  <EventData>
    <Data Name="NewTime">2015-03-02T13:35:06.500000000Z</Data>
    <Data Name="OldTime">2015-03-02T03:53:18.250703900Z</Data>
    <Data Name="Reason">2</Data>
  </EventData>

I haven't installed any new software. I don't have the Samsung Magic SSD software mentioned in other posts, and the only devices configured to wake the laptop are the mouse and keyboard, neither of which is touched when the laptop wakes up. Any suggestions on how this can be delayed until I wake up the laptop would make my wife very happy. I do have a scheduled task to wake the laptop to run the AV software while I'm away, but that's hours after it's actually waking up. Thanks!

• Edited by WhoKnowsTheAnswer Monday, March 02, 2015 2:17 PM

try to go to Control Panel\All Control Panel Items\Administrative Tools

Disable and set the trigger as never at task scheduler > time sync

You can also try to clean boot

http://support.microsoft.com/kb/929135/en-us

• Edited by britishdhez Tuesday, March 03, 2015 5:29 AM
• Proposed as answer by Deason WuMicrosoft contingent staff, Moderator Tuesday, March 03, 2015 8:37 AM
• Marked as answer by Brandon RecordsModerator Tuesday, March 17, 2015 8:24 PM

this was the issue I was trying to figure out too, and I didn't want to change the timesync on scheduled task (simply because it might cause other stuff to malfunction...)

on Desktop, go to the right bottom corner, where the clock and date is

Change Date and Time settings >> Internet Time

I was set up to automatically sync time to a server, I disabled it, and now my pc doesn't wake up by itself to sync time :)