1. Uninstall Server Extensions (\Program Files\Microsoft FrontPage\FrontPage Server Administrator).
2. Find out where you computer name is currently being stored by checking all possible three locations listed below.
3. Change each location from the old name to the new name (note: the old name may be present in one, two, or three places).
4. Open and edit C:\Windows\fpexplor.ini and C\Windows\frontpg.ini to change ALL references to old computer name to the new computer name.
5. Install the Server Extensions for server (\Program Files\Microsoft FrontPage\FrontPage Server Administrator).

FrontPage Local Host (computer) Name

Technically, it should have no spaces or non-alphanumeric characters.

In terms of where to check for the name:

FrontPage will try to determine the DNS name or TCP/IP address in order to assign it to the Personal Web Server.

FrontPage will try use several criteria. They are listed in order:

1. Open the Control Panel, double-click on the Network icon. Double-click on TCP/IP, click the DNS Configuration tab.
2. Look for a "hosts" file in Windows(no file extension). Open the file in Notepad.
3. Computers Identification. Open Control Panel, Network. Click the Identification tab."