Windows 10 Warns Users About Installing CCleaner

windows 10

CCleaner is now flagged as “potentially unwanted software by Microsoft Defender.

Microsoft apparently doesn’t support CCleaner on Windows 10 anymore. Bleeping Computer found that the software is now flagged to all users trying to install it as “potentially unwanted software” by Microsoft Defender, Windows 10’s built-in antivirus software. Here is what you need to know. 

Potentially Unwanted Software: CCleaner

Potentially unwanted apps (PUAs) or potentially unwanted software, aren’t flagged as malicious or malware. But they’re still trouble makers and very annoying. Microsoft’s explanation is somehow reasonable and more understandable. 

“CCleaner comes with bundled applications, including applications that are not required by CCleaner […] bundling of software, especially products from other providers, can result in unexpected software activity that can negatively impact user experiences,” detailed Microsoft.

The bundled apps are Google Toolbar, Google Chrome, AVG Antivirus Free, and Avast Free Antivirus – Avast owns AVG as well as CCleaner publisher Piriform. This matter won’t help the software which is still struggling with previous reputational damage. People are now questioning CCleaner’s accuracy, asking and searching on Google if “CCleaner is safe,” or “is CCleaner still infected?” 

The “infected” and malware questions relate to a malicious variant of CCleaner launched in 2017 where hackers inserted codes and stole data from many users. It was also speculated in 2019 that Microsoft intended to include links to the website on a block list on its community forums, fearing that amateurs could do more harm than good with the power of CCleaner.

A CCleaner spokesperson said: “We are in the process of engaging with Microsoft to understand why CCleaner was recently detected as PUA.” Microsoft, however, is somehow sure that this latest problem with Windows 10 will prove to be short-lived. The CCleaner’s devs are also willing to try their best to fix this issue and prevent other errors quicker and better. 

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