false detection

Antivirus detected Ccleaner Pro 5.49.6856 as a virus

Capture.PNG

I suspect that is a False Positive from Norton.

Virustotal shows the installer to be OK with one detection out of 67.

https://www.virustotal.com/#/url/4816c7962091d7043cf54373a4a7aa1dfda007bd18a1963a9767dd56b51c824b/detection

Try downloading the installer again and see if Norton still says the same.

https://download.ccleaner.com/cctrialsetup.exe

no threat detected

thanks for reply