Why is PC powering up from shutdown state?

I'm having problems with power options in my Windows 10 PC with ASUS 170-K mbo.

The PC is shut down programmatically at midnight (by calling the shutdown process), it is started automatically from the BIOS RTC at 6.00 in the morning, and during the day it is woken from sleep programmatically with a Wake on LAN (WOL) packet. This has been working as intended for some time.

However now a program is sending the WOL packet during the night and this is starting the PC, even though the PC is supposed to be shutdown. This is not what I want. I want the PC to be woken by WOL when asleep (S3), but not from shutdown.

In the Windows 10 power options, shutdown-settings screen I have 'Turn on fast startup' set.


According to this https://support.microsoft.com/en-us/...and-windows-10, with Fast Startup set but not hibernate, WOL should not start the PC from S4 or S5. But it does.

I've tried with Fast Startup on or off. Also various combinations of BIOS settings (Fast startup on boot and power on by LAN). Whatever I do a WOL packet wakes the PC whatever state it's in.

There is a separate setting in the BIOS (ErP) that I think would definitely disable WOL, but it also disables power on by RTC, so the PC couldn't be started at 6.00 in the morning.

Any ideas why WOL is powering up the PC after it's been shut down?

- - - Updated - - -

I updated the driver for the onboard Realtek PCIe GBE network adaptor. The updated driver had a whole list of new options. One of these was Shutdown-Wake-On-Lan. I disabled this, and now a WOL packet wakes the system if it's sleeping, but not if it's in shutdown.

I would open a elevated cmd prompt and use Powercfg.exe to troubleshoot.
https://docs.microsoft.com/en-us/win...d-line-options
for example: powercfg /devicequery wake_armed
This should show devices that are configured to wake the system from any sleep state.

Untick Turn on fast start-up. With this selected the computer not fully turned off.

In case it was not clear from the edit to my post, I fixed this by downloading an updated ethernet driver and disabling the option to Wake On LAN after shutdown. The updated Realtek driver has an additional Power Management tab with a lot of new settings that were not available before.