Latitude e6410 (Windows 7)/amd64: Universal Serial Bus controllers Unknown Device

About 2 weeks ago the usb ports on my Latitude e6410/Windows 7/amd64  laptop stopped working.  First it was just the upper port on the right side, then it was all of them.  I can still charge using the usb ports.

I am at a loss.  The system is continually popping up and beeping that "USB Device Unknown"

 This is the info I've gathered:

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Unknown Device

Device type: Universal Serial Bus controllers

Manufacturer: (Standard USB Host Controller)

Location: Port_#0001.Hub_0004

Device Status:  Windows has stopped this device because it has reported problems. (Code 43)

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Devices and Printers

Issues found
Unknown Device is not working properly Unknown Device is not working properly Windows has detected a problem with Unknown Device.
Problem with PnP devices Problem with PnP devices There are problems with some PnP devices. Windows will take additional steps to further troubleshoot these devices.

Issues found

Windows has detected a problem with Unknown Device.

Device information Name: Unknown Device ID: USB\VID_0000&PID_0000\6&28E0277E&0&1 Error code: 43 View device details Completed View details about Unknown Device and check if there is a solution available.

Problem with PnP devices

There are problems with some PnP devices. Windows will take additional steps to further troubleshoot these devices.

Collection information
Computer Name:	ADMIN-PC
Windows Version:	6.1
Architecture:	amd64
Time:	Friday, May 20, 2011 2:13:13 PM

Devices and Printers
Troubleshoot problems with devices and printers.
Package Version:	2.0
Publisher:	Microsoft Corporation

Devices and Printers
Troubleshoot problems with devices and printers.
Package Version:	2.0
Publisher:	Microsoft Corporation

Hardware and Devices
Use hardware and access devices connected to your computer.
Package Version:	1.1
Publisher:	Microsoft Windows

Windows Network Diagnostics
Detects problems with network connectivity.
Package Version:	1.0
Publisher:	Microsoft Windows

Printer
Troubleshoot problems preventing printing from completing.
Package Version:	1.0
Publisher:	Microsoft Windows

USB
Troubleshoot problems with a USB device
Package Version:	1.0
Publisher:	Microsoft Corporation

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I  checked the Microsoft pages and found suggestions to this problem (which seems to be a known problem) and did the following as suggested:

1) uninstalled the Unknown Device, 2) shut down, 3) removed power cord, and 4) restarted.  At which time I got the following popup message

DRIVER SOFTWARE INSTALLATION ()

Device driver software was not successfully installed.

Please consult with your device manufacturer for assistance getting this device installed.

Unknown Device                              X Failed

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Sometimes I get the following message, also:

Unknown Device Properties

Device type: Universal Serial Bus controllers

Manufacturer: (Standard USB Host Controller)

Location: Port_#0001.Hub_#0003

Device Status: Currently, this hardware device is not connected to the computer (Code 45)

To fix this problem, reconnect this hardware device to the computer.

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I have tried to update the driver for the unknown device manually, but the manager doesn't let me change the device type from unknown to usb so I can't figure out how to specify a usb driver for an unknown device.

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Can anyone help me?  How do you reconnect a usb port to the computer?

Thanks for your help in advance!

Cindy