Then make sure, before you install Vue 4 Pro again, to delete: All e-onsoftware related folders and files on your computer, it should not any more appear in the "add/delete programs" from the control pannel. All !! registries for e-onsoftware and Vue (regedit) The file called "VuePro.reg" from the C:Windows folder. Then restart your computer and re-install. this should work. It did for me (XP PRO) Guitta