IMHO: The easiest way to see if you're infected is to read at the link Corrine posted....
... and then look in your registry to see if you have the Registry key located at HKEY_LOCAL_MACHINE\SOFTWARE\Piriform\Agomo
By the time I saw the post, I had already uninstalled the program, and purged my "Downloads" folder of all the CCleaner installation files. Turns out I have a Piriform key, but in a slightly different location (HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Piriform), and there's no "Agomo".
I'm not sure if ESET removed/blocked it, if I never had it, or if uninstalling made it go away.
Just about every time I got a new version ESET flagged it for a PUP, and more recently it removed something from memory every time I opened this version.... It's also possible that I had the 64 bit version.
Edited by Pete!, 19 September 2017 - 08:06 AM.