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?