I just came across this on Intel’s web site:
http://www.intel.com/support/chipsets/usb3/sb/CS-033870.htm
This seems to indicate that the Intel USB 3.0 eXtensible Host Controller Driver 1.0.6.245 doesn’t have an issue with Windows 8. Maybe all one has to do is upgrade to driver 1.0.6.245 on your Windows 7 system, and then it will then work for the Windows 8 upgrade? Has anyone tried this?