The DevCon utility is a command-line utility that acts as an alternative to Device Manager. Using DevCon, you can enable, disable, restart, update, remove, and query individual devices or groups of devices.
Download the “Windows Driver Kit (WDK) 7.1.0 from Microsoft: http://www.microsoft.com/download/en/details.aspx?id=11800
Extract the ISO to a temp directory with WinRAR, Uniectractor
Extract the install file “WDK\setuptools_x64fre.msi” to a temp directory, where you will find “WinDDK\7600.16385.win7_wdk.100208-1538\tools\devcon\amd64\devcon.exe”
Note: devcon MUST be run from an administrator cmd win.