Try this
1) Control Panel -> Device Manager
2) Expand "Universal Serial Bus controllers"
3) Most likely you will have one or more"USB Composite Device"
4) Right click -> Properties each "USB Composite Device" listed and note its "Location", each has a unique location.
5) Plug in CC3D, do not launch GCS.
6) You now have one new "USB Composite Device", Identity which one is the new one by Right click -> Properties
7) Uninstall this new "USB Composite Device" ie your CC3D by Right click -> Uninstall
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Unplug CC3D from USB Port
9) Plug in CC3D and let windows reinstall driver.
10) Launch GCS, all should be good now.