Ccleaner what does it do

It also includes a Registry cleaner and optimiser, which will find and remove entries and streamline the database. Because these files are difficult to delete manually, software company Piriform created an application called CCleaner, which does the job for you.

You've probably heard of CCleaner, arguably the world's most popular tool for doing the job. It clears out temporary files, cleans the Windows Registry, erases browser histories, and so on.

Two, it erases private data like your browsing history and list of most recently opened files in various programs. You can run this tool at any time to free up disk space. CCleaner does do these things and more. Just select the types of data you want to delete, click the Analyze button, and look over the data CCleaner will delete. CCleaner will remember your choices for next time, so you can just open it and click the Run Cleaner button in the future.

CCleaner has another purpose: it will also delete private usage data. For example, CCleaner will erase your browser history, cookies, and cache files for any browsers you have installed — Internet Explorer, Firefox, Chrome, even Opera. It will go beyond that, erasing the cookie data stored by the Flash Player. It will even wipe out other potentially privacy-risking data, such as the list of recently opened file names in Microsoft Word, Adobe Reader, Windows Media Player, VLC media player, and other common Windows applications.

All of this is customizable, but CCleaner is set up to wipe out this data by default. There are a few reasons for this. You could use CCleaner constantly, running it every day with the default settings. However, this would actually slow your computer down in real use. Cache files are bits of web pages—images, scripts, stylesheets, HTML files, and more—that your browser holds onto. For example, when you visit How-To Geek, your browser downloads the How-To Geek logo that we display at the top of the page.

It then saves this logo in its cache. Of course, the cache can also be a privacy concern. But in general, if someone has access to your computer, you have far worse problems than them looking at your cache files. Apart from its disk cleaner, CCleaner contains some other tools as well. Some, like its ability to create a list of installed programs, are useful, but can also be done with a simple command, without CCleaner.

Others, like its built-in registry cleaner, are snake oil at best—and, in theory, could actually cause problems in certain situations. It does have a few useful tools, but all of them are better served by other third-party tools anyway—like finding duplicate files , analyzing your hard drive space , and securely erasing your drive. Instead of just running the cleaner on its default settings, take some time to go through and select the types of data you actually want to remove.

The Windows section contains options for cleaning data included with Windows, while the Applications section contains cleaning options for third-party applications you have installed. Browse All iPhone Articles Browse All Mac Articles Do I need one?

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Nyetya, inserted into the free versions of CCleaner version 5. It's believed the hackers compromised CCleaner's build environment to insert the malware. According to different reports , the malware is capable of collecting specific data from an infected computer system, including IP addresses and information on installed and active software, and sending it to a third-party server located in the United States.

CCleaner's parent company, Avast Piriform, found the malware on September 12, , and immediately took steps to remediate the problem. Initially, the company believed it was confined to the above versions running on a bit Windows systems and that downloading upgraded versions of the program would solve the problem. It's believed more than 2 million users were infected. Unfortunately, the company soon discovered the malware infection was more severe than originally believed.

A second stage payload was discovered by Cisco Talos. This payload targeted approximately 20 of the largest tech companies, including Google, Microsoft, Cisco, and Intel, and infected 40 computers. According to Wired , "Cisco says it obtained a digital copy of the hackers' command-and-control server from an unnamed source involved in the CCleaner investigation.

The server contained a database of every backdoored computer that had 'phoned home' to the hackers' machine between September 12 and 16". Although there is no definitive evidence identifying the party responsible for the CCleaner malware, investigators discovered a link to a Chinese hacking group known as Axiom.