Some un-installers don't clear up the Add/Remove Programs section. This also causes that some registry settings will never deleted.

If you to want clear unwanted entries from the Add/Remove Programs section in the Control Panel (see picture 1), follow the next steps:

Picture 1

1. Open the Registry Editor click on the Start button on your taskbar, then click on Run and type "regedit" and click on OK to start the utility (see picture 2).
   
   

   Picture 2

2. Expand  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall (see picture 3).
   
   

   Picture 3

3. To remove any unwanted keys under "Uninstall" press the DEL key to delete it permanently.