While I'm certainly not the definitave authority on this, there probabaly isn't a security issue related to this client. There is a heat issue however. Your CPU will be running at max when idle. This mean that you won't notice any speed problems doing your normal work, but the computer is going to be hammering itself at max. It's not inconceivable that you may hit a thermal problem if you have insufficient cpu cooling. -Mal
Does the program need to be open to be "working" or is the icon in the system tray sufficient for it to run?