I re-formatted my hard drive due to Mcafee errors, and now get the yellow question mark for the Ethernet Controller can any one help?  I have re-installed my chipset drivers.  Still no dice (bangs head on computer) below are my drivers I show installed from my resource CD for my computer.  If nothing else would a new PCI adapter card be an possible solution? 

Dell Diminsion - Windows XP

Ethernet Controller is integrated

ASSEMBLY, CARD (CIRCUIT), PLANAR (MOTHERBOARD), NETWORK INTERFACE CARD/CONTROLLERS, DIM8250

Network (NIC) Driver

Intel 10/100 LOM rev> A01-00

System Drivers

Intel 800 series Rev: A06-00

Video Drivers

NVidia 64mb GeForce4 MX 420 w/tv out Rev:A00-00