Thanks for your reply.
I have Avast Antivirus Free Edition and Windows Firewall.
I have just uninstalled CCleaner and reinstalled using your link. Settings as default.
The program now gets as far as opening but then crashes. Previously it didn't open before causing crash.
I have not tried running in safe mode but will if you suggest so.
I do not have Winapp2.ini or any 3rd party cleaner.
Await your response.