I just built a computer with the motherboard M4A785-M
I cannot seem to be able to install the driver for the Realtek network adapter. When i try to install the driver it says "The Realtek Network Controller was not found. If Deep Sleep Mode is enabled Please Plug the Cable"
Also, it doesn't show network adapters in device manager.
I'm actually having the same problem with the same motherboard. It is currently flashed to the newest revision, I'm running a 64-bit windows 7 with a phenom quad, 4gbs of 800mhz RAM, and an aftermarket cooler.
For giggles and grins, I re-imaged the drive, reset the BIOS with the jumper, I even pulled out the RAM, the BIOS battery, and the power cord but still no Internet.
In my device manager, it doesn't even have a Ethernet adapter in there. Just my Bluetooth adapter.
For another giggles and grins, I even pulled out an older adapter that I know works, and still had the same problem (it was a realtek card as well)