Piriform’s CCleaner is a top-rated utility tool that has features such as registry cleaner, application/browsers data cleaner amongst various other useful things. Their Disk Analyzer and Driver Wiper has garnered positive reviews for providing the utility for free.

What is a Potentially Unwanted Application?

Windows Potentially Unwanted Apps, also known as potentially unwanted programs that protect the computers from by disallowing the users from installing untrusted, suspicious programs that may cause irreparable harm and damage.

What is a Potentially Unwanted Application?Locked Horns with MicrosoftMicrosoft Identifying CCleaners as a PUA – 2020Avast Enters the Picture

The PUA can be turned off from the settings as well which Microsoft advises against unless the users are absolutely sure about the application/program being blocked.

Locked Horns with Microsoft

Back in early 2019, Microsoft banned CCleaner’s website on the Microsoft Community forum. The ban was a result of Microsoft’s consistent stance on the damage that registry cleaner does to Windows PCs.

Microsoft Identifying CCleaners as a PUA – 2020

The Microsoft Security Intelligence site has added a new entry to its database, which classifies CCleaner as a PUA: Win32/CCleaner threat. While no reasons have been given on the move, we could gather the following Microsoft’s policy on registry cleaning utilities.

Avast Enters the Picture

In the fall of 2017, Avast, a popular antivirus vendor, purchased CCleaner as a part of their expansion plan. They started bundling their additional products and promotions inside the CCleaner installer. Some products such as registry cleaning utilities suggest that the registry needs regular maintenance or cleaning.  However, serious issues can occur when you modify the registry incorrectly using these types of utilities. These issues might require users to reinstall the operating system due to instability. Microsoft cannot guarantee that these problems can be solved without a reinstallation of the Operating System as the extent of the changes made by registry cleaning utilities varies from application to application. Piriform sunk themselves further into a puddle of problems by toying with user consent on CCleaner regarding sharing usage information with the company. This was on top of the mandatory push of updates which could not be disabled.

Windows Defender Is Warning Users Not To Install CCleaner - 46Windows Defender Is Warning Users Not To Install CCleaner - 57