I have a cmoputer every thing fine except detecting usb. I check device manager nothing wrong with usb driver (there is no question mark)but if put any thing in usb port it not detecting. What is wrong how can I fix it?. Thanks.

Which port are you talking about.? Back? Front? Hub? port on an add-on card? If it is a built in port on the motherboard usually located in the back of the computer or cabled to a front connection Check in the BIOS to make sure all USB ports are enabled. Add-on cards installed in a PCI slot have their own drivers and they may need to be re-installed. Hubs can cause issues because of lack of adequate power source In reference to 11/05/2008 "So this is how liberty dies. With thunderous applause." - George Lucas

both side of usb port not detecting ,i have not try port on an add-on card( i do not have it). All the usb are enabled.

General USB Troubleshooting in Windows XP http://support.microsoft.com/defaul... --------------------- Windows XP Does Not Detect Your New USB Device http://support.microsoft.com/defaul... --------------------- http://support.microsoft.com/defaul... Try the Device Manager solution in the article.