Thanks Bill but yes,according to my 'default programs and file associations'list inside control panel.There is talk of downloading specific codecs
from the web but I'm trying to avoid this - if possible. Ian
In other words Windows does not know what opens it.
In my 8.1 file associations I have .EXT extension as Unknown Application.
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It is either Norton Commander or a binary email script.
please read what is at that link I gave you.