The required driver is missing when you are installing a device. Windows XP Prompts you to go online and search for the driver using Windows Updates. However, experience tell you that is absolutely useless and will only be adding to your hassle.
Usually a driver is included on a CD provided with the device you have purchased. If this is not the case for some reason, you can always download the software from the device manufacturer's website. Why not disable the unnecessary request to search for drivers when you can install them much faster yourself.
The Go to : "Start > Run" and type "gpedit.msc"(without quotes) and navigate to:
Local Computer Policy > Computer Configuration > Administrative Templates > System
Section on the left pane of the window. Now choose and double click on "Turn off Windows Update device driver search prompt". In the window that appears, chosse "Disable" and apply the settings.