Can Windows Clock wake the computer from sleep?

Yes, Windows Clock can wake the computer from sleep. This feature is referred to as “Wake on Alarm” and can be used to wake the computer at a particular time or when a certain event occurs. It is enabled through the Control Panel’s Power Options.

When Wake on Alarm is enabled, the computer’s hardware clock keeps track of any scheduled wake events. When the hardware clock reaches the designated event time, the system wakes up. The wake event can be set with the Windows Clock, or other applications such as task schedulers and programs that use the Windows Task Scheduler.

To enable Wake on Alarm, open the Power Options control panel by pressing the Windows + X key combination and clicking on Power Options. Then click on Change plan settings for the currently selected power plan. On the next screen, click on Change advanced power settings. In the Advanced Settings window, scroll down to the Sleep heading and expand it. Look for the Wake On Alarm subsection and expand it. Here you will find the setting “Allow wake timers” which should be set to enable.

Once this setting is enabled, you can then use the Windows Clock to enable wake events. To do this, open the Windows Clock program under the All Programs on the Start Menu. Select the Clock tab, then click on the “Change date and time settings” button. On the following screen, click on the “Change alarm settings” link in the bottom-right corner. On the next screen, enter the desired wake up time. You can also check the box labeled “Recur every” if you want to wake up at a specific time each day. Once you have set the alarm time, click OK to save the settings.

Now your system is configured to wake up at the specified time. You can check the system log to verify that the wake event has been recorded. To do this, open the Event Viewer (Application and Services Logs) in the Administrative Tools folder and look for a Wake Source entry with a time stamp that corresponds to the time that was set in the Windows Clock.

When the wake time arrives, your system will automatically wake up, regardless of whether you are actively using it or have put it into sleep mode. If you don’t want the system to wake up on its own, you can disable wake timers by returning to the Power Options control panel and setting “Allow wake timers” to disabled.

In conclusion, Windows Clock can indeed be used to wake up a computer from sleep. All you need to do is enable the “Allow wake timers” option in the Power Options control panel, then use the Windows Clock to set the wake up time.