Techradar: The best free alternatives to CCleaner 2017. “CCleaner has long been one of the web’s most popular PC cleanup tools, but after it was acquired by Avast and suffered a serious malware attack, many people have begun seeking alternatives. Running out of hard drive space is less of an issue these days thanks to the plummeting price of storage, but there are still many reasons to use a tool like CCleaner to purge unwanted files.”