I even went so far as to remove CCleaner Basic from my computer and reinstalled, yet get the attached message when I try to install. Moreover, no matter how I try to update, the installation does not work and I am constantly notified I don't have the latest version. Attached is a screenshot of the warning I get when I install.
Does anything here help?
https://forum.piriform.com/topic/5739-solution-when-ccleaner-wont-install-or-download-windows/