W7/64 USB Drivers not loading on boot-up -- W500

[FrankK-F]

Installed W7/64 onto clean SSD with all ThinkPad items added and updated off the Driver Matrix (W500).

Using with 2503 Dock I have up to 13 USB devices attached .. just like in former WXP/32-SP3 setup.

Now when I start the system, only my Logitech LASER mouse (with USB transceiver) driver loads ... ALL others have yellow flag (not loaded). Strange is that this even affects my expansion slots ... that don't register until USB flagged USB drivers are manually updated.

Further I looked in the windows/system32/drivers folder and none of the several USB driver files are present.

Is there a way to repair this situation without the agony of reinstalling everything.

Any advice would be greatly appreciated.