Ok, the problem was autoruns

reg query "HKCU\Software\Microsoft\Command Processor" /s

How to change the default startup directory for Command Prompt?

Hidden gotcha: The command processor's AutoRun setting - The Old New Thing - Site Home - MSDN Blogs

This could (or not) be considered a win32 perl bug as SH_PATH/Config#sh is lacking a /D option 

$ perl -V:sh
sh='cmd /x /c';

[download]

$ cmd /?
...
/D      Disable execution of AutoRun commands from registry (see below
+)

...
If /D was NOT specified on the command line, then when CMD.EXE starts,
+ it
looks for the following REG_SZ/REG_EXPAND_SZ registry variables, and i
+f
either or both are present, they are executed first.

    HKEY_LOCAL_MACHINE\Software\Microsoft\Command Processor\AutoRun

        and/or

    HKEY_CURRENT_USER\Software\Microsoft\Command Processor\AutoRun

[download]

In reply to Re^2: Can't install any modules (autoruns SH_PATH "cmd /d /x /c") by Anonymous Monk
in thread Can't install any modules by ihopnavajo

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.