+1
CCleaner v5.57 has Avast Antivirus checkbox set
Installer download:
https://www.ccleaner.com/de-de/ccleaner/download?upgrade
Scroll down and select the download link for free, pointing to download.com
I have Unchecky v1.2 so it is not a duplicate of:
https://unchecky.userecho.com/communities/1/topics/864-ccleaner-installs-avast
since that makes it sound like it has been resolved when it clearly hasn't
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