Windows 7 Won't Resume after going to Sleep Mode

Goto Device Manager by typing Device Manager into the search box and press enter.

Expand the selection for "Universal Serial Bus Controllers". Right click on the top most "USB Root Hub" selection and select "Properties".

Select the Power Management Tab and untick the the box indicating " Allow the computer to turn off this device to save power" and click "OK". Do the same for the other "USB Root Hub" items on the list. Now close the Device Manager and try if this works...