Recently my Windows 7 machine wouldn't wake up from sleep no matter what I did so I had to always power it down which was extremely annoying. After some browsing I stumbled upon a fix which so far has been working. Basically there is an option to allow a USB device to wake the computer, which is off by default and might be the culprit. Here's how you change that setting.
Start > Right Click My Computer > Properties.
Select Device Manager on the left hand side.
Expand Human Interface Devices.
Right Click on HID-compliant consumer control device/HID-compliant device > Properties and select the Power Management tab.
Check Allow this device to wake the computer and select OK.
Do this for all of the HID-compliant consumer control device/HID-compliant device located in the Human Interface devices section.
Hopefully you will no longer have an issue with your Windows 7 machine not waking up from sleep.
Start > Right Click My Computer > Properties.
Do this for all of the HID-compliant consumer control device/HID-compliant device located in the Human Interface devices section.
Hopefully you will no longer have an issue with your Windows 7 machine not waking up from sleep.
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