This can be alot of things.
I think you are revering to the 'Installed Software' tab in Rs Pro.
It will list everything it can find about any software installed.
Software like Nokia for instains likes to install some thirdparty software and that has a diffrent name then Nokia in the 'Author' colum.
But it is still needed for the Nokia software to run.
Also, sometimes some software use old Registry paths becouse they changed name or something, but to stay compatible with there older version they keep using the old path in the registry. And therefor could be misleading for you if you don't know if it is installed.
You can always try to remove the entrie, Rs Pro will create a backup.
If you then experiance any problems, you can restore the backup.