Help with Missing Ethernet Driver on Dell Desktop

I have a Dell OptiPlex 9010 Desktop computer with windows 10 Pro. I have had no issues until now.
I have internet via a dish on roof and cable thru wall that goes to Ethernet adaptor with power to surge protector and Belkin Router.
I have Ethernet cable from router to desktop computer (Dell ). I wifi with Laptops off of this router with no problems. Now my Dell
Desktop will not go online. It says Ethernet driver missing. I have installed new driver off of Dell website and still have the same issue.

NE 1 know what to do or do I have to get a diff. Ethernet Card?

Thanks in advance

check in device manager if ethernet is active. i think admin-rights needed, am i correct experts?.
there is also a repair-function in windows. also had access-problems but situation was different. if its onboard-lan it must be activated in cmos-setup. i think you didnt change anything there.