Why My Laptop Wakes Up From Standby Without My intervention?

Something wakes my laptop from standby and i don't know what. I get these at the same time and see them in Event Viewer:

• Intel(R) 82579LM Gigabit Network Connection
  Network link is disconnected

• gupdate
  
  The description for Event ID 0 from source gupdate cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.
  
  If the event originated on another computer, the display information had to be saved with the event.
  
  The following information was included with the event:
  
  Service stopped

Any ideas?

Same thing happened to me once, my laptop woke at 3 AM, music blasting and all . I traced it to Windows Update, which was set on full auto at 3AM.

If you want to turn if off:

• Start>Run open: gpedit.msc

• The Local Group Policy editor will open.

• In the tree list on the left select:

• Local Computer Policy
  
  > Computer Configuration
  >> Administrative templates
  >>> Windows Components
  >>>> Windows Update

• In the panel on the right, double-click on :

• "Enabling Windows Update Power Manager to automatically wake up the system to install scheduled updates" (pfew...)

• Select the 'Disabled' option.

• <OK>

Or, you can just change the Time setting in Windows Update.

Hope this helps!