HowTo (as admin)
1. On cmd, Type 'set devmgr_show_nonpresent_devices=1'
2. Type 'devmgmt.msc' (This will open up Device Manager)
3. Click View > Show hidden devices
4. Expand Network adapters. (The old physical network cards are grayed out.)
5. Right-click on these NICs and click Uninstall.
6. Once all of the grayed out NICs are uninstalled, assign the IP address to the virtual NIC