I have an app that uses MSDE. Recently we loaded it on a site machine and the connection to our site was unsucessful so I tried to re-install. I reinstalled and everything was gla. When I tried to put service pack in place it failed because there were two instances running. I know you say no way to even load with one present but it's there. The problem is I can't remove in Add/remove programs. I went into registry and removed all I could find and took out a SQL entry that screwed up the OS. Everytime I boot up it say there is a problem with SQL and I still can't remove the instance nor re-install my program. Any ideas? Do I need to re-install OS (2000 PRo with SQL 2000. Thanks