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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Does emacs cache something on windows when invoking call-process?
Date: Wed, 10 Jul 2019 17:33:57 +0300
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> From: Eighty Megabytes <emacsuser@freemail.hu>
> Date: Wed, 10 Jul 2019 07:31:32 +0200 (CEST)
> 
> So the question is: does the latter warrant running a virus a scanner or
> is the danger so low that it's better to keep windows defender off?

IME, anti-virus software is generally OK (with minor exceptions --
there are a couple of them that should be avoided at all costs), but
you need to configure it so it gets out of your way.  For example,
binaries that you build yourself should be exempt from having all the
files they open examined, it's enough to have the binary itself
examined (to make sure no malware attaches itself to it).  I suspect
Emacs in your use case is one such program.