Morrowind Installation problem?

Did you just delete the Morrowind files and folders or did you run the uninstaller? If you just deleted it then there are probably traces of it, likely registry entries. Go to add/remove programs, find Morrowind in the list and try to uninstall it. I'm not sure how well it will work, considering it won't be able to find most of the files it's trying to get rid of. If that fails, use something like CCleaner (http://www.piriform.com/ccleaner) and scan for unused registry entries related to Morrowind and delete them. It sounds like the problem was caused by an interrupted installation or the ISO being incomplete. It might be best to start again with a new ISO.