Does CCleaner work on Windows 10

Windows 10 should no longer warn about CCleaner

Panagiotis Kolokythas

The CCleaner developers reacted to the Microsoft warning and made appropriate adjustments.

EnlargeCCleaner is one of the popular PC cleaning programs
© CCleaner / Piriform

We recently reported that Microsoft may classify the PC cleaning program CCleaner as a potentially unwanted application (PUA) and warn users under Windows 10 about this via Windows Defender. The developers have now reacted and made appropriate changes to the software. Strictly speaking, changes were necessary in the way that CCleaner is partially bundled with other software and delivered to users.

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The CCleaner developers tweeted that they were in contact with Microsoft to investigate the matter. It then adds: "We suspect the problem is related to the bundling with other software and we are confident that we have changed this accordingly so that our product is no longer tagged that way."

In connection with the PUA warning against CCleaner, Microsoft had also pointed out that it was less about CCleaner itself than about the programs that were also delivered with it. Specifically, the warning from Microsoft says: " Certain free installers and 14-day trials of CCleaner come with bundled applications, including applications that are not required by CCleaner or that are produced by the same publisher, Piriform. "

Microsoft criticizes this type of bundling not only with CCleaner but also with other software vendors when it "leads to unexpected software activity that can negatively impact the user experience." Accordingly, Windows users receive the warning "potentially unwanted application". Even if these installation programs give users the option not to install the bundled software because it could then be installed inadvertently.

From Windows 10 May 2020 update: Protection against PUAs integrated

EnlargeAs of May 2020 Update, Windows 10 protects against potentially unwanted applications

Microsoft has integrated the new reputation-based protection in Windows Security in Windows 10 May 2020 Update (Windows 10 Version 2004). This warns or blocks installations when users try to install potentially unwanted software (PUA). The corresponding setting can be found under "Windows Settings -> Update & Security -> Windows Security -> App & Browser Control" and then "Reliability-based Protection". By default, however, the function is deactivated and can then be activated with a switch by clicking on the link "Settings for reliability-based protection" and then "Potentially unwanted apps are blocked". The users can also decide whether only the installation of such software is blocked or the download as well. You can find more information about this feature here at Microsoft.