Realtek ethernet controller not found?

[jason O'connor1]

I got a pc off a friend and i was going throught the setup and am having issues with the ethernet controller, i can use my wifi dongle but not a lan cable for some reason i have tried checking my bios files and it is enabled, the controller is not found and is saying if it is in deep sleep mode plug cable?? i Cannot find a driver for it in my device manager just for my wireless lan and i have tried removing the ram for 10 minutes. I have also tried reinstalling the driver Please help.

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