After the "Uninstall" or "Add Remove Programs".... you don't know what Cling-ons are left behind. It's common to have entire Folders (Bf1942) with files mucking about. I use NBG Cleaner. It takes up to an hour to sort-out the messy parts, and the end decision is up to the user on some element-removals, but I've yet to find another Registry Cleaner that is as thorough. And for hacking the Registry it's a hobby.... hehe, but has led me to the Format command more than twice... yup, yup.