I keep getting the error message " A redirect request will change a secure to a non-secure connection. I have deleted the program and its associated folder twice now.
You need to give us more information if we are to try and work out just what is going wrong.
Your Windows version and which AntiVirus you use are usually the absolute basics to be able to start troubleshooting problems, so it saves time if we don't have to ask for them.
For instance Trend Micro AV is currently blocking CCleaner, Trend are working to fix it and we can tell you what to to to get round it yourself until they do.
That particular error message you report is often associated with Windows TLS settings.
Open the Control Panel, and go to Internet Options, Advanced tab, scroll to the bottom, in the Security section, and tick all of the <strong>Use TLS</strong> versions, (except the 'experimental' one if you have that).
DEP and ASLT settings can also cause installs to fail; see the post in the thread linked below.
This thread contains various solutions that have been shown to work when download/install fails to work for various reasons (Including old OS's and hardware).
https://community.ccleaner.com/topic/5739-solution-when-ccleaner-wont-install-or-download-windows/