Onboard LAN Adapter not seen by Device Manager after upgrading BOIS

[zillah2004]

Dear Experts

I have MotherBoard ASUS P5GC-MX/1333 in the link below :

ASUSTeK Computer Inc. -Support- Drivers and Download P5GC-MX/1333

Every thing was working fine (XP Prof SP3) till my mate upgraded the BOIS after that Onboard LAN Adapter got missing from the Device Manager and the LAN icon got missing from my "Network Place".

I did a fresh installation of windows still the same problem is going on, then I realized the problem with BOIS.

I have checked BOIS and I enabled every thing that I would have thought is related to onboard LAN but still no joy.

What should I do to rectify the problem

Thanks

[JEROY]

I suggest that your mate check the Bios driver he downloaded . Maybe he downloaded a Bios for a different revision . The same boards come sometimes with different revision numbers like rev 1.0 or 2.0 or any similar number .
Check directly on the mainboard , and you'll find the right version next to the board name .

[electric]

try clearing the CMOS,had similar problem different board [ASUS ]

[stroyal]

What dose the LAN adapter show in device manager?

Never mind, I see now, it is missing.
Is there a chipset driver?
Although a BIOS flash, shouldn't wipe out drivers.