The programme installs fine, it seems it just doesnt want to launch it afterwards. I downloaded the files vie the download page on Sixupdater.net. I've just tried your suggestion of deleting all traces and then reinstalling but the problem still persists. The desktop in question is a 4 year old Dell Inspiron 530 running windows vista. One cause could be that whenever i attempt to check for updates through the control panel it chooses not to respond. If this could be the cause, is there any way of getting it working without having to buy any extra software?