A. A. When you select "Map Network Drive" from Tools menu in Explorer and click the drop down box for the path, Explorer checks the HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Network\Persistent Connections area of the registry for a list of old/current drive mappings. To remove items from the list (or add) perform the following:

  1. Start the registry editor (regedit.exe)
  2. Move to HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Network\Persistent Connections
  3. In the right hand pane you will see a list of values a-z and each value will have a value like "\\<machine name>\<share>"
  4. To remove a map, select the letter associated with it and click DEL
  5. You should now edit the Order value and remove the letter you have just deleted.
  6. If you wish to add a mapping select New - String Value and enter a name of a-z (use one that is not in use) and press enter. Double click on your new value and set to the share name, e.g. "\\johnmachine\d$"
  7. Edit the Order value and add your new letter to the end of the string.
  8. Close the registry editor
  9. Start Explorer and your new share or removed share will have taken effect.