There is a chance when downloading the latest version of CCleaner that your anti-virus program will flag the installer for CCleaner to contain a Trojan, and/or a Virus.
This is a what we call a "false positive". Meaning that there is actually not a virus inside the program. It's usually caused by the Google bundle that is inside the setup file. The issue is usually fixed within 24 hours.
There are a few things you can do to fix the problem too. If you receive a Trojan/Virus warning when