This behavior typically occurs only with Web pages on your local area network (LAN) that are accessible using a UNC path (for example, \\server\share), but it can also occur on the Internet if your network administrator has enabled you to share files and printing functions over the Internet. The Common Internet File System (CIFS) defines a standard remote file-system access protocol for use over the Internet, using Domain Name Server (DNS) or NetBIOS for name resolution. Contact your Internet Service Provider or network administrator if you are unsure if this applies to you.
For additional information on CIFS, please see the following Microsoft Web site: