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On a Windows Vista-based computer, you turn on the "wake from sleep" option for a network adapter that supports Wake On LAN (WOL) functionality. After you do this, the computer does not wake from sleep when it receives network traffic.
For example, you click to select the Allow this device to wake the computer check box on the Power Management tab of the properties dialog box for the network adapter. You install the sample PassThru driver that is included in the Microsoft Windows Driver Kit (WDK), or you install a virus scanner that uses the same PassThru driver technology. Then, you put the computer to sleep. However, the computer does not wake from sleep when you send a PING command or a "magic" packet.
To work around this problem, use one of the following methods:
Uninstall the sample PassThru driver.
Contact the manufacturer of your virus scanning program to find out if a program update is available that does not exhibit this problem. You may have to use a different virus scanning program.
For information about your hardware manufacturer, visit the following Web site:
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
Note You should uninstall the existing virus scanning program before you install a different virus scanning program.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.