Eche un vistazo a Baby FTP Server .

Este servidor Baby FTP tiene solo las funciones más necesarias y, sin embargo, es lo suficientemente potente como para ser la base de un servidor más complejo.

Es un único ejecutable que no requiere derechos de administrador ni instalación. Simplemente descárguelo, haga doble clic y listo.

So, the one I've found is called Quick`n Easy FTP Server Lite. It is pretty simple to use but does give if need quite a few advanced options. It's free and compatible with windows XP. Now, in regard to your main requirement, it can run without admin rights but here's what you need to know: You must allow the port to go through your router (for public use) and window's firewall itself (which usually requires admin rights). There is no way around the windows firewall with getting an open port without admin rights but you may not need them depending on how to firewall was setup (try and see if it works). In any case, this software should be exactly what you're looking for - it even has a XP control panel looking interface:).

Quick `n Easy FTP Server Lite (gratis)

Quick `n Easy FTP Server Lite es un servidor FTP independiente de subprocesos múltiples que ofrece características avanzadas y seguridad. La interfaz es sencilla e intuitiva, con secciones organizadas para la gestión de usuarios, configuración...