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Computer wakes from sleep at almost exactly the same time every day
My computer automatically wakes from sleep mode at the exact same time every day, around 3:00 AM, without any user interaction. I have checked the task scheduler but couldn't find any obvious tasks triggering this, and I need help identifying what is causing these daily wake-ups.
3 Replies
Open Event Viewer and navigate to Windows Logs > System. Use the "Filter Current Log" option and look for events with the source Power-Troubleshooter.
An almost exact 3:00 AM wake strongly suggests a wake timer or scheduled maintenance task rather than random activity. Immediately afterward, open an elevated terminal and run powercfg /lastwake, powercfg /waketimers, and powercfg /devicequery wake_armed. These identify the last wake source, active timers, and devices allowed to wake the PC. If a maintenance or update timer appears, open Task Scheduler, locate that task, and inspect its Conditions setting for “Wake the computer to run this task.” Windows has historically scheduled automatic maintenance around 3:00 AM, so also check Security and Maintenance > Automatic Maintenance > Change maintenance settings. Disable wake permission only for the source you confirm; do not turn off all maintenance or updates. If a network adapter or mouse is named, clear “Allow this device to wake the computer” in its Power Management tab. If the commands are inconclusive, generate powercfg /systemsleepdiagnostics and review the recorded transition.
If you run the powercfg /waketimers command and paste the output here, I can help you interpret exactly which task is responsible.
