Dell Optiplex 7020 mini tower. Onboard Ethernet, Windows 7 Pro. SP1
Network and Sharing Center show "Unknown" as network. No Adapter listed.
Device Manager shows onboard Intel Ethernet. I can uninstall, and adapter will be recognized.
CHKDSK c: /F found no problems
Ran Startup Repair - couldn't find a problem
Tried System Restore to a point 5 days ago.
"System Restore did not complete successfully. Your computer's system files and settings were not changed.
Drive might be corrupt. Try running chkdsk /R
chkdsk /R is going to take 45 minutes, and I don't know if that will help at all.
I could try a USB ethernet adapter.