Optiplex 745 (0RF703 motherboard) + Win7 usb problems

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Optiplex 745 (0RF703 motherboard) + Win7 usb problems

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I recently upgraded from XP to Win 7 x64 and try as I might, I simply cannot get the USB ports on this machine to run at 2.0 speeds.  I haven't been able to find any information as far as an updated driver for the Intel ICH8 chipset.  Everything shows up correctly - the driver is for the Intel ICH8 Family USB Universal Host Controller - 2830, version 6.1.7600.16445 (usbhub.sys, usbport.sys, usbuhci.sys) from 6/21/2006.  Does anyone have any suggestions?

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