Windows in hibernate mode sometimes stops saving properly.
Windows in hibernate mode sometimes stops saving properly.
It's possible my PC would suddenly power on if I were in Area 51. More seriously, you might find the log entries revealing what triggered the wake-up—perhaps a LAN wake-up packet, a tiny mouse movement due to vibration or an earthquake, pets moving around, or Windows attempting an update.
Enable the connectivity in standby feature for power management. Adjust the setting to off for both battery and standard power modes. This helps prevent devices from constantly waking up unnecessarily.
Launch the command prompt with admin privileges and run execute: powercfg /lastwake. This displays the device or software that last activated your system, such as OS maintenance (Start > type: Maintenance > pick: Security & Maintenance > expand: Maintenance > Change maintenance time. Wake on LAN/Magic Packet). Review your UEFI/BIOS settings for related options and ensure they are turned off. Also, check the network card properties in Device Manager to confirm those features are disabled. If needed, driver issues may be present; mouse movement can also trigger wake-up if supported—verify BIOS/UEFI and Device Manager settings. You can also inspect additional timers using the command: powercfg /waketimers. Ignore "StartMenuExperienceHost.exe" from the list if necessary.
I'm facing the same issue. I've searched extensively online for a solution. Here are some steps that helped: Check your Device Manager and turn off all Wake-On-Lan settings under the Advanced tab. Also, modify mouse settings to disable "Allow this device to wake the computer." Navigate to Control Panel and verify Backup and Restore options—some scheduled backups might trigger the PC. Use Task Scheduler via Run window with 'taskschd.msc' to inspect scheduled tasks. Check the Task Schedule Library for any entries that wake the PC. As GoodBytes recommended, open Command Prompt as administrator and run 'powercfg /lastwake' to see if SystemEventsBroker is scheduled. Related advice from the Microsoft forum suggests adjusting Power Options under Plan Settings, then Advanced—look for "Allow wake timers" in Sleep settings and turn it off. On another forum post, someone mentioned installing a program might be necessary. Initially, I focused only on Wake-On-Lan settings and found them ineffective. I tried nearly every suggestion listed and tested the PC over two nights. It seems network issues could be involved, possibly due to an unplugged Ethernet cable last night. However, the PC wouldn't power on every evening, so it might not be network-related. I'll follow up in two days with more details.
I've tried it for three consecutive nights and it never turned on, which confirms it worked!