A Windows 7-based mobile PC does not wake from sleep for scheduled tasks

On a mobile PC that is running Windows 7, you create a task in Task Scheduler and select the Wake the computer to run this task option. When the mobile PC enters the sleep mode, it does not wake up to run the task at the scheduled time.

By default, the ability to wake the system from sleep for a timed event is disabled on Windows 7-based mobile PCs. Programmed timed events do not wake the system regardless of whether the mobile PC is on AC or on battery power. However, you can change the Power Options settings to enable the wake timers.

To change this behavior, follow these steps.

1. Click Start
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   , type power options in the Start Search box, and then click Power Options in the Control Panel list.
2. Click the Change plan settings option that is next to the power plan that is selected, and then click Change advanced power settings.
3. Expand Sleep, expand Allow wake timers, and then select Enable.
4. Click OK.

This behavior is by design.

Note If you use Windows Vista, you can visit the following Microsoft Web page for help with power consumption and battery life problems: