Automatic Maintenance always wake my ASUS laptop from sleep(S0) on finish.

Question

Any idea to fix it without disabling Automatic Maintenance on register? PS:

1. [Allow wake timers] are disabled.
2. [ Allow scheduled maintenance to wake up my computer at the scheduled time.] is unchecked and grayed out.
3. [powercfg /waketimers] showed nothing.

Answer 1

Hi Hexbug,

Since your ASUS laptop is using Modern Standby (S0), the wake event may be coming from a maintenance-related wake timer rather than a device waking the system. Windows can schedule maintenance tasks during idle periods, especially when the device is connected to AC power.

To help identify the source, please try these quick checks:

1. Open Command Prompt as Administrator and run: powercfg /lastwake - this will show what most recently woke the PC.
2. Run: powercfg /waketimers - this will list any active wake timers that may be triggering the wake event.
3. If the wake source points to a scheduled task or maintenance task, review your BIOS/UEFI settings for options such as Wake on LAN or RTC Wake, and temporarily disable them for testing.

The results from the two powercfg commands can help determine whether the wake is being triggered by Windows maintenance, a scheduled task, or firmware settings.

Let me know if you need further assistance, feel free to ask me by clicking "Add Comment" or "Add Answer" if you cannot add comment so your response will be visible. Thanks for your effort.

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Answer 2

Automatic Maintenance is designed to resume the computer from sleep when the system is not likely to be in use, and on laptops it respects power policy, which by default allows wake-up only on AC power. On newer systems, maintenance tasks run when they are due and the machine is idle and on AC power, so the wake behavior seen in S0/Modern Standby is consistent with that design.

To reduce or stop the wake behavior without disabling Automatic Maintenance in the registry:

1. Check whether the device is using Modern Standby or S3.
   • Open an elevated PowerShell or Command Prompt.
   • Run: powercfg /a
   • This shows whether the machine is S3 capable or Connected Standby/Modern Standby capable.
2. Disable wake timers in the active power plan.
   • Go to Control Panel > Hardware and Sound > Power Options > Edit Plan Settings > Change advanced power settings.
   • Expand Sleep > Allow Wake Timer.
   • Disable it for the relevant power state.
   • This is the primary supported setting to prevent scheduled maintenance from waking the PC.
3. Turn off the Automatic Maintenance wake option.
   • Go to Control Panel > System and Security > Security and Maintenance > Automatic Maintenance.
   • Clear Allow scheduled maintenance to wake up my computer at the scheduled time.
   • This prevents the Regular Maintenance task from waking the machine at the scheduled time.
4. Verify what is scheduling the wake.
   • From an Administrator command prompt, run: powercfg /waketimers
   • If Automatic Maintenance is responsible, it will show the Regular Maintenance task.
   • In Event Viewer, check Application and Services Logs/Microsoft/Windows/TaskScheduler/Maintenance for Event ID 808, which identifies the application requesting wake during the next regular maintenance run.
5. If wake still occurs, check firmware and task settings.
   • Check BIOS wake settings.
   • Confirm the task is configured with WakeToRun if investigating a specific scheduled task.
   • On systems that support Connected Standby, scheduled wakes depend on the machine being AOAC capable.

This approach keeps Automatic Maintenance enabled while blocking or limiting its ability to wake the laptop.

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