try this to identify the devices :
Start>Programs>Accessories>Sy
stem Tools>System Information.
Now select "Components" and highlight "Problem Devices".
All hardware devices with a driver problem will be listed here.
Make a note of the first line of the PNP Device ID line of the entry. It will show a Vendor number and a Device number (VENxxxxDEVxxxx) both four digits long.
Look up those numbers here:
http://www.pcidatabase.com/index.phpThis will tell you the manufacturer and the chip number. Check the dell's website first