Link at bottom has some results about sudden, recent localhost failures

    working for several years, today localhost not found
    after GUI reboot attempt

    localhost and 127.0.0.1 should be the same, 
    it seems strange they shows different results.

    wusa /uninstall /kb:5066835 (restart)
    wusa /uninstall /kb:5066131 (restart)
    wusa /uninstall /kb:5065789 (restart)

ref: https://kagi.com/search?q=windows+localhost+not+working&dr=2...