It uses select on pipes, a unix feature. Use IPC::Run instead. 
use IPC::Run qw( run );

run(
   [ cmd => '/c', 'dir' ],
   '>', \my $out,
   '>', \my $err,
)
   or die "dir: $?"

print "OUT: $out ERR: $err";

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In reply to Re: Using SYSTEM2 on Windows by ikegami
in thread Using SYSTEM2 on Windows by rthawkcom

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