This has a free version I have used successfully for years ...
After first running the applications built in uninstaller, it proceeds to search and remove all registry entries and all program files from the computer.
Just remember not to click on any restart now dialogues associated with the offending program's uninstaller, allow the Revo application to finish it's thing before any reboot.
Revo Uninstaller Pro - Uninstall Software, Remove Programs easily