Plinks documentation1 suggests, that you should not use Plink for interactive shell sessions, like you normally do with ssh, but for automated tasks instead. However, if you pass the -t
parameter to your plink call, you can give it some interactive behaviour (with limitations).
some other alternatives to ssh in a windows environment are:
freeSSHd (provided by Microsoft) http://www.freesshd.com/
openSSH http://www.openssh.com/
dropbear https://matt.ucc.asn.au/dropbear/dropbear.html
I've tested none of these, but I think you'll figure it out :)