I had this problem.
Windows 7 64 Bit.
Replaced the Windows RealTek drivers with the dell ones and the D W L5102 with the dell drivers and this corrected my issue of no LAN adapter,
Also updated to the latest BIOS.
I had this problem.
Windows 7 64 Bit.
Replaced the Windows RealTek drivers with the dell ones and the D W L5102 with the dell drivers and this corrected my issue of no LAN adapter,
Also updated to the latest BIOS.