CCleaner does not clean C:\Windows\SysWOW64\Speech_OneCore\Common\SpeechRuntime.exe -ToastNotifier
Thanks, it is known.
CCleaner does clear it but Windows puts it straight back, it's part of Windows 10 21H1 & 21H2 and is loaded onto your computer by Windows.
Just ignore it.
This is one reason why we advise against running the Registry Cleaner on Win 10 unless you have a specific registry problem - Win 10 changes the registry much more frequently than older Windows did.
Mr. nukecad, thank you very much.