There is no need to open or close a command window to run a Perl program on Win 10.

Please show your code.

Oh, I see..
You open an O/S window shell by say using 'cmd' and then type in a command that runs a Perl script.
The Perl program can exit(), you come back to the window that you started in the first place.
Perl can not cause its parent to exit.

#if your Win 10 Perl is configured correctly,
#save the following lines as "test.pl".
print STDERR "asdasdf\n";
sleep (3);
print STDERR "Goodbye\n";
sleep (2);
[download]

Double-click on test.pl in the GUI and you will see the result.