IDK.
Unless, by some magic you can install 10586 over top of 14279 by performing an in-place upgrade repair.
I don't know of any other way.
AND
Because of course 14279 in newer than 10586 it may not recognize it as an OS "upgrade"
Neosmart has a pretty good article on it here https://neosmart.net/wiki/windows-10-repair-installation/
You can skip the first couple paragraphs where they are promoting their recovery CDs and drill down to the meat of the article below.
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