Power management causing system wake-up

4.5

The computer wakes up from sleep on its own, often in the middle of the night.

Symptoms
  • PC on in the morning
  • Fans spinning in bag
  • Battery drained while "off"
Possible Causes
  • Wake timers
  • Network card "Wake on LAN"
  • Sensitive mouse

Step-by-Step Fix

1

Find Wake Source

Run "powercfg /lastwake" to see what device or task woke the PC.

2

Disable Wake Timers

Power Options > Change plan settings > Advanced > Sleep > Allow wake timers > Disable.

3

Disable Wake on LAN

In Device Manager, uncheck "Allow this device to wake the computer" for your network card.

When to See a Technician

Windows Update is a frequent culprit for middle-of-the-night wake-ups.

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