usb root hub drivers not working in Windows XP Professional

In a Dell Inspirion 1150, I have 4 usb root hubs that are not functioning correctly.  I have tried numerous things to get them to work.  They currently have yellow exclamation points on them.  The usb host controllers do not have the exclamation points, just the root hubs.  I have uninstalled both the host controllers and root hubs in safe mode and then restarted in normal mode with no success.  I have also tried reinstalling the chipset drivers with no luck.  Will I have to reformat and start over to fix this?
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Try the usb ports in knoppix (, if they work in knoppix you may have to reinstall windows to get the usb ports to work again, if they dont work in knoppix either then you have a bad motherboard.
Try a repair install to fix the drivers: 
did they ever work properly? or is this a new build?
check the usb settings in the bios then.  What mobo is it?
U dont have to reformat the system to fix this out, just reinstall the OS and try to configure the USB, if at all this doesnt work then try to configure the same with the Mother board driver CD.

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tudorjlAuthor Commented:
I wound up reformatting the system.  There turned out to be other major problems with the system.  The USB hubs are working correctly.
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