Yes i came to the same conclusion , got it down to 3 devices which will cause it to stop now , still dealing with tech atm as i think whatever they changed in F7 for improved support for USB3 ports is causing the issue , all the devices are working fine with F6 and worked fine on my old rig only thing thats changed is the bios , trouble is getting them to understand that .
FYI devices that have issues with F7 are microsoft X8 mouse , Ideazon Zboard & AMBX light sets .