Backing up a folder from one windows machine to other

view story

http://superuser.com – I have two systems at my home say A and B both are on a LAN. There are some folders on client A which are very important and as such i need continuous back up of those folders on client B. I have installed Golden FTP server on client B and want an automatic synchronization of client A with client B. Please provide the steps to achieve the following. (HowTos)