On other operating systems, there are ways to see what process or event woke them from suspend. I leave my laptop often for multiple days in suspend, sometimes to find that it has woken itself up and is heating whatever surface it is resting on:) Is there a way to find out what woke it up so that I can prevent that thing from happening again?
Hey tobarbe,There could be many factors interrupting Windows 7 sleep feature. Here’s how you can find out.Method 1: Disable Wake on LAN (WOL) feature.When you enable WOL, the network adapter continues listening to the network when the computer is asleep. WOL wakes the computer if it receives a special data packet.
This can result to unwanted wake up events during sleep mode.To disable it, follow these steps.a. Go to Start.b. Type in Device Manager into the start menu search box.c. Navigate to “Network Adapters” and find your network adapter.d. Right-click it and choose Properties from the menu.
In the resulting dialog, choose the Power Management tab.e. Uncheck the box next to “Allow this device to wake the computer” to solve the problem.Method 2: Find out what wakes up your Windows 7/Vista from its sleepStep 1:To find out what event/device woke up your Windows from its sleep state, use powercfg command.Here’s how:a. Go to Start and type cmd.b.
![See What Woke My Computer Last See What Woke My Computer Last](/uploads/1/2/5/4/125487628/233539091.png)
Press Enter.c. Type the following command and then press Enter.powercfg – lastwaked. To get the most detailed info (and probably easiest) on the device that wakes your Windows up during the sleep, type the following command and then press Enter.powercfg –devicequery wakearmedYou’ll find a list of devices that wakes up the computer.Referral link for the command:Powercfg Command-Line OptionsStep 2: You can disable the device from waking your computer up by following Method 1.If there are multiple devices listed, you may remove or disable one device at a time till you figure out the culprit device.
Post the details about the powercfg report here for further troubleshooting.Regards,Shinmila H - Microsoft SupportVisit our and let us know what you think.
How to Stop Network Activity From Waking Your PC on Windows 7, 8 and 8.1To edit this particular setting, we need to open the Windows Device Manager. To open it, press the Win + R keyboard combination, type “devmgmt.msc” and press enter. This generic method of opening the Device Manager allows the article to work on all recent versions of Windows.Expand network adapters and right-click on the one you want to change the setting for, then choose properties from the context menu.Here you will find a “Allow this device to wake up the computer” option. Uncheck the box to disable it. Optionally, you can leave it enabled and check the option “Only allow a magic packet to wake up the computer” which will prevent everything except Wake-On-Lan packets from waking up your machine.Interestingly enough, you can also opt to change this same setting for a USB port. This might come in handy if you use for USB ports to charge your cell phone, for example.On a side note, does anyone actually use Wake-On-Lan?
If so, what do you use it for? Let us know in the comments.