Microsoft Defender Antivirus flags these installers provided that you have enabled the protection against potentially unwanted software. The company notes that the programs that come bundled with CCleaner are not malicious in nature, but that they may be unwanted by the user who runs the installer. To protect Windows users, Microsoft Defender Antivirus detects CCleaner installers that exhibit this behavior as potentially unwanted applications (PUA).
While the bundled applications themselves are legitimate, bundling of software, especially products from other providers, can result in unexpected software activity that can negatively impact user experiences.
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The installer may also offer Google Chrome or Google Toolbar but there are probably more offers such as CCleaner Browser (it used to be offered some time ago at the very least).Ĭertain installers for free and 14-day trial versions of CCleaner come with bundled applications, including applications that are not required by CCleaner or produced by the same publisher Piriform. Microsoft lists four products on its site of which two are owned by Avast: Avast Free Antivirus and AVG Antivirus Free. Some of CCleaner's installers bundle third-party software. Often, these offers are checked for installation by default, or the installer is designed in a way that may confuse the user in installing the offered products. A common form of these kind of applications bundles other, often third-party software, with the installer this is done by the company for financial reasons or to push some of its other products. Potentially unwanted software is not outright malicious, but as the name suggests, may be unwanted by the user. It comes with several other features including options to update installed programs, run a health check, or clean the Registry. CCleaner is a popular tool for Windows to remove temporary files to free up disk space.
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