Click on the Start button, bottom left of you screen. Click on All programs. Click on Registry Dr and there should be an uninstall option. Click on that and follow the instructions. Hope this helps.
You need to download and install IOBIT UNINSTALLER 3.0 free and run it to see if it is a listed program. If it is not listed in the programs shown in the uninstall program the it will be an imbedded program. Go to All programs and Features and check it there . If it is there click on it and at the top of the program box you will see force uninstall click on this and allow it to do it and follow the prompts as required.