On 11/26/2017 05:45 AM, J. P. Gilliver (John) wrote:

[snip]

The original _reason_ for hiding extensions (even having the _option_ to
do so) - presumably to avoid confusing the poor dumb users - was mostly
superseded when malware started to use double extensions,

It's multiple dots. A file has one and only one extension.
"file.txt.exe" is NOT a text file. Windows knows that even if it lies to
you in a directory window or open dialog.

and isn't
really valid since they introduced the change in (I think) 7 whereby
"rename" defaults to no longer highlighting the extension.


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