Click start right click on computer select properties device manager scroll down universal serial bus controllers you could see a yellow question / exclamation mark? ! or a red X
you will need to update/reinstall drivers right click to reinstall drivers
if you can see your usb drive but its not working
ports (com&lpt) right click update driver if this fails to fix the problem
Check the USB leads that attach to the motherboard usually red white green black make sure they are securely seated and have no dust build up on them dust will cause static and a lot of unforeseen problems to a computer and its parts
Rather doing a driver hunt which can take hours
it might take some time being a freeware driver solution
Note: it will find all of your outdated drivers
This will automatically search for and find the correct driver you will have to update every driver individually once you update you might be asked whether you want to restart or make a system restore point.
Click no to both of these then continue updating each driver free then restart once all of the drivers have been updated.
also at cnet
on the home page you should see a search tab just type in what you are looking for
IE: Motherboard name sound drivers.
Place a tick in either windows software or all software box.
You might have to try a few times to get it right.
if you need more help with this or if i have missed the problem post a reply