C:\Windows\SysWOW64\Speech_OneCore\Common\SpeechRuntime.exe -ToastNotifier

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.

https://community.ccleaner.com/topic/59952-i-get-a-registry-error-on-ccleaner-on-windows-10-i-have-scanned-5-times/?tab=comments#comment-326804

Mr. nukecad, thank you very much.