Hardware devices such as webcams will only work if the proper device drivers are installed on the computer. It is advisable to create a back up of all the device drivers of a system in an external storage device. However, in case the device driver CDs are lost, they can be recovered from the internet. Webcam drivers for Logitech webcam V-UH9 can be downloaded from the official website of the company. It is recommended to download the Logitech webcam V-UH9 device drivers from the official website as only they are guaranteed to be fully updated and reliable device drivers for the Logitech webcam V-UH9.
If you are unable to find your CD for one of the Logitech webcams, for the example the V-UH9 (or any of the more recent models), you can find the relevant webcam drivers in the Logitech support centre.