Issue: I recently had a client moving emPath 6.4 from one server to another. The installation on the new server was easy. However we faced a challenge removing emPath 6.4 from the old server. Specifically, after removal emPath 6.4 remained in the add/remove list under "settings > control panel > add or remove programs".
Response: The resolution was found in the following Microsoft knowledge database article.
How to manually remove programs from the Add or Remove Programs tool
Note that challenge also affected my custom efforts, in that sometimes I need to start with a fresh install of emPath 6.4