Usb port not working

first check whether ur os is windows 98 or xp if it is 98 then for any device u need usb driver. if it is xp ten its ok. check the device manager whether usb driver is loaded in ur system. right click on my computer icon not the shortcut icon. then select mange then select the device manager from the option available on left hand side of the window. then check the usb section whether any driover is loaded into ur system. if not then install from ur motherboard cd. if that also does not work them u need a replace of the usb port.
tell me u have a error message window cannot recognise the usb. if this appears then it need a replacement of the port. thank u

Try connecting it to a different USB port. Every time you switch the USB port a device is connected to, it will completely reinstall the drivers and reset.

Remove your device from the device manager and reboot unit.
Restart and reload device drivers.
Make sure the driver are for xp pro

you can change it from the motherboard. or you buy another motherboard and fix it.

go to mfg websight and down load all th proper drivers there is likely a mother board driver not installed that allows it to see the ports
install all of the manufacturer's drivers
dont expect that microsoft wrote windows just for your computer it is a general set of generic drivers that make most things work but not every thing
http://support.dell.com/support/downloads/driverslist.aspx?c=ca&l=en&s=gen&ServiceTag=&SystemID=LAT_PNT_PM_D600&os=WW1&osl=en&catid=&impid=

When you connect a printer to your pc the operating system adds a virtual port. Your pc will typically have 3 physical usb ports but can have as many virtual ports as you have devices to connect to it.

1: Ensure that your printer has media loaded and is powered up and ready to print. Connect the USB cable. You should get a message on pc screen saying device (printer) found.

Open printer driver ( double click on the zebra printer icon - Start/control panel/printers & Faxes/) Click print test page. If it doesnt print you will see a printer icon with a red question mark.on your toolbar, double click on this. This will bring up a small window showing status of the print job, Click printer/properties/ports. Select the next free usb port and click apply. Drag the print status window so that you can see the message in the status window change from Error print to error Restarting. repeat trying each of your usb ports until printer works. start with the higheat usb with highest number and work your way down.

try another usb port first..

you may need to update your xp to service pack 2 or 3 as well.

I fixed the problem by going to "Device Manager," then to the "Universal Bus". Under "Universal Bus" are a list of the individual USB ports. You have to delete each one individually. When you delete each one, a window opens up which gives you various headers; select "drivers" and hit "uninstall". When you hit "uninstall", windows will ask if you want to proceed. Select "Yes". You'll then get a "warning" that the computer may not work correctly if do this procedure. You want to proceed with the deletion of each Universal Bus port. Once you've removed the Universal Bus ports, then reboot windows. Windows will detect the individual Bus ports and find new drivers for them. Once the drivers are installed (automatically by Windows), the USB ports will be operational.

update you device in the internet if didn't your again, try to used another OS. Use Windows XP

Thinks you can do Upgrade your Bios, do windows Updates