Sleep/Hibernate failure (PC wakes immediately)
4.5
The PC enters sleep mode but turns back on within seconds without user input.
Symptoms
- PC won't stay asleep
- Fans spin up randomly
- Monitor stays on
Possible Causes
- Mouse movement
- Network "Wake on LAN"
- Scheduled tasks
Step-by-Step Fix
1
Check Last Wake Event
Run "powercfg -lastwake" to see what triggered the wake-up.
2
Disable Mouse Wake
Device Manager > Mouse > Properties > Power Management > Uncheck "Allow this device to wake".
3
Check Wake Timers
Power Options > Edit Plan > Advanced > Sleep > Allow wake timers > Disable.
When to See a Technician
Network cards are the most common "ghost" wake-up culprits.
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