Hey guys! I have this problem at home, my sister's computer can't seem to detect the LAN cable at all.
These are the things I already tried:
1. Disabling and enabling the connection / Uninstalling and reinstalling the drivers.
2. Virus scan and Combofix.
3. Physical check of the LAN cable, and tested it with my laptop (was able to detect without any problem)
4. Cleared the DHCP on my router.
Oh yea, would installing Apache might cause this kind of behavior?