This is most common issue I have encountered being computer engineer, non-technical user commonly go to add/remove programs to uninstall program (software).
Sometime computer software does not get uninstalled properly or software is are not listed (missing) in the add/remove program.
In this situation I use the most common Microsoft Windows software utility called: Microsoft Windows Installer Clean Up (cleanup) Utility.
Click here to download Windows installer cleanup utility.
Once download is complete, click the setup file to install it by clicking next, next wizard.
Now go to all programs, Click Windows Install Clean up.
This will open up a pop-up displaying all the programs installed on your computer.
Please see the screenshot for reference, now click the software which you want to uninstall and click Remove button.
Doing this will uninstall program completely from program files and registry, now reboot the computer for changes to take effect.
You may want to check out: Best Online Utility
Note: Please be careful before editing registry, take a registry backup for making changes in registry.