Wake-on-LAN is a protocol for remotely waking computers from a low power mode. When a network adapter detects an Ethernet packet or a WOL event, the Wake-On-LAN (WOL) feature will wake up a Windows computer from a low power state. In Windows 8, Microsoft changed the default behavior of how the computer responds to WOL events.
Wake-on-LAN behavior in Windows 8
Wake-On-LAN is not officially supported from the S5 power state in Windows 7. In Windows 7, when you shut down the PC, the system is put into the S5 states and all devices are put into the D3 state, which is lowest power state.
In Windows 8, you may be aware that when you shutdown the computer, the system is put into the S4 hybrid shutdown or Hibernate state and the devices into the D3 state. Wake-On-LAN is supported from S3 (Sleep) or S4 (Hibernate) state in Windows 8.
You can read more about the different System Sleep States in Windows 8 here.
Enable or Disable Wake-on-Lan in Windows 8
By default, Wake-on-Lan is enabled on Windows 8. But if you wish to check or change its settings, you will have to open Device Manager. Open Win+X menu and select Device Manager.
Scroll down to network Adapters and find the networking device. Right-click on it and select Properties. Under the Advanced tab, in the Property box, you will see Wake on magic Packet. From the drop-down menu, you can make your choice.
Freeware to remotely wake computer
WakeOnLAN is an open source tool lets you easily wake up and shut down remote Windows machines. It can perform the following tasks for you:
- WakeUp a remote computer that is powered off
- Shutdown a remote computer
- Ping the selected remote computer, to display its status
- Perform an emergency shutdown of ALL defined computers at once
- Connect to the remote server via Remote Desktop
- Listen for WOL packets.
You can download it here.
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