Microsoft Windows 10 Defender flags CCleaner as Potentially Unwanted App

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Microsoft Windows 10 Defender flags CCleaner as Potentially Unwanted App

As you all know Microsoft has been very active in detecting issues and bugs on Windows 10, the company also introduced a security defender that helps users detecting bugs and viruses. Meanwhile, Microsoft’s Windows defender has now flagged the popular PC optimizer CCleaner for Windows as potentially unwanted app.

Potentially Unwanted Application (PUA) protection is a feature that allows Windows Defender Antivirus to detect and block unwanted apps. In the Windows Defender options, the user can configure real-time protection options. Windows 10’s Anniversary Update introduced Limited Periodic Scanning, which optionally allows Windows Defender to scan a system periodically if another antivirus app is installed. It also introduced Block at First Sight, which uses machine learning to predict whether a file is malicious.

CCleaner for Windows is a free PC optimizer that frees up space on your computer by removing unnecessary files such as cookies, unused data, and temporary files. This Piriform’s program runs regular checks and finds those elements that slow down your computer performance.

According to user reports, CCleaner was flagged by the Windows 10 Defender as a Potentially Unwanted Program with a low-level alert. However, users can still manually allow the app to run on their systems as CCleaner was not detected as a threat to the system.

The installers detected as PUA include CCleaner installers that have been found bundling the following applications. Note that these are normal applications that are not detected by Microsoft Defender Antivirus.

  • Google Chrome
  • Google Toolbar
  • Avast Free Antivirus
  • AVG Antivirus Free

While the CCleaner installers do provide an option to opt-out, some users can easily inadvertently install these bundled applications. CCleaner later tweeted that they are in talks with Microsoft about the problem and will resolve the matter soon.

Microsoft explains in its threat database that CCleaner is now detected as PUA: Win32/CCleaner by the Windows Defender Antivirus, with all files automatically removed from Windows computers.

“Exercise caution when installing software to avoid unwanted applications that might be bundled with the installer” mentioned the report. However, if you trust CCleaner then you can allow the app under Windows Security.

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