A Windows 7-based computer unexpectedly wakes from sleep at a certain time every day


A Windows 7-based computer unexpectedly wakes from sleep or resumes from a power saving state at a certain time every day. This problem does not occur if the computer is completely shut down.


This problem occurs when the update function of Windows Media Center starts automatically.


To work around this problem, change the schedule settings of the update function in Windows Media Center. The default setting is to update daily, to workaround the problem, change the setting to update at log on. To have us work around this problem for you, go to the "Fix it for me" section. If you would rather fix it yourself, go to the "Let me fix it myself" section.

Fix it for me

To fix this problem automatically , click the Fix this problem link. Then click Run in the File Download dialog box, and follow the steps in this wizard.

Enable update at log onEnable update daily

Note These wizard may be in English only; however, the automatic fix also works for other language versions of Windows.

Note If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD, and then you can run it on the computer that has the problem.

Let me fix it myself

To resolve this problem yourself, follow these steps:
  1. Click StartStart button , click All Programs, click Accessories, click Systems Tools, and then click Task Scheduler.
  2. In the Task Scheduler window, expand Task Scheduler Library.

    Task Scheduler Library
  3. Expand Microsoft, expand Windows, and then select Media Center.

    Media Center
  4. In the center pane, locate and then double-click mcupdate_scheduled in the Name column.

  5. The mcuupdate_scheduled Properties window is displayed.

    mcuupdate_scheduled Properties
  6. On the Triggers tab, select the task that is triggered daily, and then click Edit.

  7. In the Edit Trigger window, select At log on in the Begin in the task list, and then click OK.

    Edit Trigger
  8. In the mcupdate_scheduled Properties window, confirm that At log on is shown in the Trigger column, and then click OK.

    mcupdate_scheduled Properties - At log on
  9. Close the Task Scheduler window.

    Close Task Scheduler