Avast reckons CCleaner malware infected 2.27M users

[Nick]

Users of a free software tool designed to optimize system performance on Windows PCs and Android mobile devices got a nasty shock this morning when Piriform, the company which makes the CCleaner tool, revealed in a blog post that certain versions of the software had been compromised by hackers..

Avast bought them out ..

https://techcrunch.com/2017/09/18/avast-reckons-ccleaner-malware-infected-2-27m-users/