On occasion, you'll find that an application listed in Add/Remove Programs even after you've uninstalled it from your computer. You can remove such applications from Add/Remove Programs by editing your computer's registry. Begin by running Registry Editor and accessing the key "HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionUninstall".
You'll find keys listed below the Uninstall key that correspond to the applications you see listed in Add/Remove Programs. You remove an application from this list by selecting its key in Registry Editor and then deleting it.
source:PCstats