Quick fix: Wake-on-LAN (WOL): enable in BIOS first (Wake on PCIe / Wake on LAN). Then Device Manager → Network adapters → pick Ethernet adapter → Properties → Advanced tab → enable Wake on Magic Packet + Wake on Pattern Match. Same dialog: Power Management tab → tick Allow this device to wake the computer. Send magic packet from another device to wake.

Wake-on-LAN lets a magic packet wake your PC from sleep. Requires: BIOS WOL support, Ethernet (Wi-Fi WOL rarely supported), correct adapter Advanced settings, and Power Management config.

Symptom: Want to enable Wake-on-LAN for a specific adapter on Windows 11.
Affects: Windows 11.
Fix time: ~15 minutes.

What causes this need

Wake-on-LAN: remotely wake PC via magic packet. Useful for: home server, remote access, scheduled tasks, energy savings (sleep until needed).

Method 1: Enable in BIOS

The first step.

Restart PC. Enter BIOS (F2, Del, or vendor key during boot).
Navigate to Power Management or Advanced section.
Find options like:
- Wake on LAN or Wake on PCIe: Enabled.
- Power on by PCIe / PCI: Enabled.
- ErP Ready / Deep Sleep: Disabled (ErP Lot 6 disables WOL).
Save and exit BIOS.
For specific motherboards: check vendor manual for exact menu names.
For laptops: WOL support varies. Often not supported on battery; only when plugged in. Some laptops disable WOL entirely.
For ITX / NUC / Surface: may not support WOL.

This is the BIOS prep.

Method 2: Configure Windows network adapter

The Windows-side setup.

Open Device Manager.
Expand Network adapters.
Right-click Ethernet adapter → Properties.
Switch to Advanced tab.
Configure (names vary by vendor):
- Wake on Magic Packet: Enabled.
- Wake on Pattern Match: Enabled.
- Wake on Link Settings: Disabled (to avoid spurious wakes).
- Energy Efficient Ethernet: Disabled (interferes with WOL).
Switch to Power Management tab.
Tick:
- Allow the computer to turn off this device to save power.
- Allow this device to wake the computer.
- Only allow a magic packet to wake the computer.
Apply.
For Wi-Fi: typically no WOL support. Use Ethernet only.

This is the Windows config.

Method 3: Test Wake-on-LAN

For verifying setup.

Find MAC address of Ethernet adapter:
```
ipconfig /all
```
Look at Physical Address of Ethernet.
Note IP address.
From another device on same network: send magic packet.
Tool options:
- Wake-On-LAN GUI (Windows): free tool to send.
- Wake on LAN (Microsoft Store).
- WakeMeOnLAN (NirSoft).
- Android / iOS apps for sending from phone.
- Command line: wakeonlan [MAC] (with python script or third-party tool).
Sleep PC.
Send magic packet to PC’s MAC address.
PC wakes up.
For wake over Internet (WoWAN): requires router port forwarding + dynamic DNS.
For chronic spurious wakes: check powercfg /lastwake to see what woke PC.

This is the test route.

How to verify the fix worked

PC wakes when magic packet sent.
Wake works from sleep state.
Wake works even after hours of sleep.
System still functional after wake.

If none of these work

If WOL doesn’t work: BIOS not enabled: revisit BIOS settings. Some motherboards have subtle WOL options. For ErP Ready / Deep Sleep / EuP: must be Disabled. Reduces deep sleep but enables WOL. For laptops: WOL on battery rarely supported. Plug in. For Wi-Fi adapters: Wi-Fi WOL very rare (Wake on WLAN). Use Ethernet. For different subnet: WOL via broadcast doesn’t cross subnets. Use directed broadcast or unicast. For VLANs: WOL may not traverse VLANs. For fast startup interfering: disable Fast Startup. For Hibernate vs Sleep: WOL from Sleep (S3) works; from Hibernate (S4) requires more BIOS config.

Bottom line: Enable in BIOS first. Device Manager → Ethernet → Advanced → Wake on Magic Packet. Power Management → Allow this device to wake the computer + Only allow magic packet to wake. Test with WakeMeOnLAN tool.