Dial-Up Networking 1.4
  for Windows 95:
    Dial-Up_Networking_1.4_Windows_95.exe   (originally dun14-95.exe)

  for Windows 98 -- not Windows 98 Second Edition (SE):
    Dial-Up_Networking_1.4_Windows_98.exe   (originally dun14-98.exe)

  for Windows 98 Second Edition (SE):
    Dial-Up_Networking_1.4_Windows_98SE.exe (originally dun14-SE.exe)


Dial-Up Networking (DUN) 1.4 Upgrade
for Windows 95, Windows 98, Windows 98SE (separate files for each)
http://support.microsoft.com/default.aspx?scid=kb;en-us;q285189

List of Problems That Are Fixed By the DUN 1.4 Upgrade
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q311215