Windows makes a mess of all the network adapters when installing NIC cards. Sometimes, you remove network adapters, and you're left with something like "Local Area Network 3" that can't be renamed back to "Local Area Network". The problem is, Windows remembers the previous adapter (even if it is physically removed), so you can't rename the adapter, otherwise it would conflict with previously named adapters.
To view and remove all previously (non-connected) NIC adapters:
1. Open cmd.
2. Type
set DEVMGR_SHOW_NONPRESENT_DEVICES=1
3. Open device manager by running devmgmt.msc.
4. View > Show Hidden Devices.
Now, you can remove any adapters that were previously installed (but no longer present) in windows. These are the adapters that appear slightly grayed out in Device Manager.
After doing so, you should now be able to rename the network adapters back to "Local Area Connection".
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