Filezilla 3.0.4.1
This is by far the simplest way to setup an FTP server on a windows box. It is a fully-featured and free server and client software that has enough features to make it one of the best. The interface once connected performs the same as a fully-fledged linux-based FTP server which will mounts in a similar fashion and even accepts some of the same commands.
Download a stand-alone client here or from the website.
Tags: file transfer, filezilla, ftp, ftp client, ftp server