after doing so, look in the created .INI files for your remnants.
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Parameter
CCleaner.exe /EXPORT
Explanation
CCleaner exports the cleaning rules to the INI files. Three INI files will be created in the CCleaner's installation folder - winapp.ini, winreg.ini and winsys.ini. They contain cleaning rules for the Application section, Registry Cleaner and the Windows section respectively.
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Then what? Do I have to manually edit those .ini files?
No, you don't do anything to the ini files. Open the winapp.ini file (should open by double clicking it) and search for the programs listed in your screenshot above.
Registry location examples hlighted here ...
When you find each one, they will show you the registry locations CCleaner searches for those entries. Search the registry with something like regedit for the displayed locations. If you find them, just delete them. And bare in mind, CCleaner just cannot find every single entry in the registry for programs removed from your computer.
The ini file also shows you the folder locations which you can search for leftovers.
I have RealPlayer still listed in CCleaner and I have extensively searched the registry for any RealPlayer entries as well as for files and/or folders, and I can't find anything. Yet there it is listed in CCleaner/Applications.
My CCleaner also lists Google Toolbar and Windows Live Messenger although there isn't a trace of either on my computer. Not that I can find and I know how to look.
So good luck with your search and post back if you're doubtful about deleting anything.