Try google, there are a million links
you should have look at apples website before asking
you need new drivers...
DIRECTLY FROM:
http://support.apple.com/kb/TS1538
Symptoms
When drivers required by a PC's USB interface are not installed correctly or are out of date, an iPod connected to this computer may not be recognized properly.
One or more of the following may occur:
* iPod is not recognized in My Computer
* iPod does not appear in iTunes
* iPod cannot be restored in iTunes
* iPod screen does not display "Do Not Disconnect" screen when connected to the computer
* An exclamation point appears next to the iPod's entry in Device Manager
Products affected
* iPod (all models)
* Microsoft Windows 2000
* Microsoft Windows XP
Products Affected
iPod, iPod shuffle, iPod nano, iPod touch, Microsoft Windows 2000, Windows XP