I just plugged in a mass storage device through a USB port, and it appears as
if it installed correctly.

I go to "My Computer" and the device is not there.

I deinstalled, rebooted, turned off all security, and plugged the device in
again.

I opened "Device Manager" and everything seems in order.

Still no mass storage device listed in "My Computer."

Have the same issue with a PC Card Adapter, and a digital video camera.

Any help would be appreciated