When all else fails, use Windows update, and/or
If you go in device manager, (for whichever device you need driver for)
Right click properties, go in details for the device driver.
You will see a code like per example VEN_8086&DEV_27D8&SUBSYS...
The VEN code means vendor and the DEV code means device: in this case the vendor is 8086 and the device is 27D8.
Once you have the two codes, go to www.pcidatabase.com.
Enter the two codes and you should get the name of your hardware. From there you can search for a driver download for your hardware.
My name is vikash and I work for the Social Media and Community Team at Dell
To download the drivers for webcam, please click on the following link: http://bit.ly/fidLPi
Then create your account there. When you finish with the account creation process, it will give you the drivers list and will also have the webcam drivers .From there you can download the drivers for webcam.
Let me know if this helps or if you need any further support