If you use the Network Map feature in Vista, you may have noticed it doesn’t work when the network connection is classified as Public, or you're using a domain network. However, you can enable it for either of these networks; here’s how:
- Run gpedit.msc from the Start menu search field.
- On the Group Policy Object Editor, browse to: Computer Configuration -> Administrative Templates -> Network -> Link-Layer Topology Discovery.
- Individually right click the Mapper I/O (LLTDIO) and Responder (RSPNDR) drivers and click Properties. Then on their Properties dialog check the appropriate options to allow public and/or domain connections.
Eric Geier is an author of many wireless networking and computing books including Home Networking All-in-One Desk Reference For Dummies (Wiley 2008) and 100 Things You Need to Know about Upgrading to Windows Vista (Que 2007).