No network adapter in device manager

Recently did a system restore on a Pavilion p6750z running Win 7 Professional 64-bit. After the restore was complete there is no network adapter in the device manager. There are no unknown devices there either. It's as if the network adapter does not exist. Tried manually installing the drivers for it - not possible because Windows says there is no adapter. Realtek's diagnostic software does not find it either.
Over the years I have seen NICs fail before, but they would always still be in the device manager even though they did not function. This is the first time I have seen one just disappear from device manager. I suppose that it is just a matter of a bad adapter, it just seems rather odd because it was fine before the system restore.

Hi,
Yes it does seem odd.
Go into Device Manager and rescan the hardware. Use the Action TAB or right mouse click at the top of the device tree on your PC.  Do you now see the adapter in Device Manager?
Boot into the bios (F10 setup) and make sure that the on board LAN adapter is enabled.  Is it detected and enabled?  It should be listed under Advanced.
HP DV9700, t9300, Nvidia 8600, 4GB, Crucial C300 128GB SSD
HP Photosmart Premium C309G, HP Photosmart 6520
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Windows 7/8 UEFI/Legacy mode, MBR/GPT

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