Certain types of Dell Optiplex machines have a network card that was not supported. (including the Intel Corporation 82567LM-3 Gigabit Network Connection) Since this card is now supported. (via the e1000e driver)
The following installation CD (4.3 rc2) will this card standard. If you update to 4.3 you can now install the driver. Updating can of course only if the machine on the Internet through another network card.
