Since you're getting this error, I assume you were able to re-install windows after the format, which means it was reading discs then. It sounds like you are simply missing the driver for your device.
Here is the list of drivers for your machine:
http://support.dell.com/support/down...n&catid=&impid
It would probably be a good idea to install most of them, as you may run into other issues without them. Even if you don't, you will gain functionality and improved performance with correct drivers installed.