I have "!" in generic mount control device. The Win7 gives the device status as "This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)" Under driver files it lists GenericMount.sys and wdfcoinstaller01009.dll. When I got to the details I found that the manufacturer was Symantec. A little more explorering showed that it was using oem44.inf and as near as I can tell everything is where it is suppose to be.
The inf file notes suggest that this is for installing a Ramdisk, which I don't have. Also in the notes was:
; Using Devcon: Type "devcon install GenericMount.inf GenericMount" to install
Don't know who that information is intended for but it means nothing to me.