No Entire Network in My Network Places
User Configuration\Administrative Templates\Windows Components\Windows Explorer
Removes all computers outside of the user's workgroup or local domain from lists of network resources in Windows Explorer and My Network Places.
This policy removes the Entire Network option and the icons representing networked computers from My Network Places and from the browser associated with the Map Network Drive option. Also, Certified for Microsoft Windows programs do not permit users to browse for network resources outside of their workgroup or domain.
This policy does not prevent users from viewing or connecting to computers in their workgroup or domain. It also does not prevent users from connecting to remote computers by other commonly used methods, such as typing the share name in the Run dialog box or the Map Network Drive dialog box.
This policy was documented incorrectly on the Explain tab in Group Policy for Windows 2000. The Explain tab fails to mention that this policy affects Certified for Microsoft Windows programs.