Hidden devices
From Attie's Wiki
When you unplug a device from your computer, Windows will remember it!
This can get annoying, cause device names to contain "#6" etc... try the following:
- Click Start, click Run, type cmd.exe, and then press ENTER.
- Type set devmgr_show_nonpresent_devices=1, and then press ENTER.
- Type Start DEVMGMT.MSC, and then press ENTER.
- Click View, and then click Show Hidden Devices.
- Expand the Network Adapters tree.
- Right-click the dimmed network adapter, and then click Uninstall.