A slow PC, useless files piling up and software monopolizing resources… If your Windows computer is starting to show signs of fatigue, a good cleaning program can give it a boost. But beware: not all cleaners are created equal: some are inefficient, while others hide paid-for features. To save you time, we’ve selected the best free PC cleaning software in 2025, with no pitfalls and truly effective.
If you’re looking for Windows repair software, this is the place.
BleachBit: The ultimate open-source cleaner for Windows and Linux
BleachBit is an open-source program designed to clean up unnecessary files on a computer and protect users’ privacy. Available for Windows and Linux, it deletes temporary files, caches, browsing history and other superfluous items generated by various applications. Its aim is to optimize disk space and improve system performance, while limiting the traces left by software and Internet use.
Unlike proprietary alternatives such as CCleaner, BleachBit focuses on transparency and ease of use. It features an intuitive graphical interface and a command-line mode for automated cleaning. In addition to conventional deletion, BleachBit features a secure deletion function that renders files irrecoverable, a major asset for users concerned about the confidentiality of their data.
Although powerful, BleachBit must be used with care, as improperly configured removal can result in the loss of important files. Nevertheless, it remains a reliable and efficient solution for computer system maintenance, particularly prized by advanced users and cybersecurity professionals. Its open-source, cross-platform nature makes it a versatile tool accessible to all.
⚠️ Cleaning software is not meant to be used every day! Many files are useful for speeding up your computer’s performance. Daily cleaning is counterproductive.
CCleaner : The benchmark PC cleaner for Windows and Mac
CCleaner is an optimization software designed to clean up unnecessary files, improve performance on Windows, macOS and Android systems, and ensure better management of computer resources. Developed by Piriform, it deletes temporary files, browsing history, caches and obsolete Windows registry entries. Its intuitive interface makes it accessible to both novice and expert users looking to free up disk space and improve system stability.
In addition to its cleaning functions, CCleaner offers tools for managing start-up programs, uninstalling applications and searching for duplicate files. The professional version includes automatic updates, real-time monitoring and advanced technical support.
CCleaner is one of the most popular optimization tools, used by millions of users worldwide. Its effectiveness, however, depends on careful use: it is recommended to check settings before each cleaning, and to avoid over-aggressive modifications to the Windows registry.
Discover our guide to deleting temporary files and enhancing CCleaner’s power:
DISM++: The handy tool for cleaning and repairing Windows
DISM++ is a powerful, freeware tool that serves as an advanced graphical interface to the Windows DISM command-line utility. Unlike conventional cleaners, it not only frees up disk space by deleting temporary files and old updates, but also optimizes the system by managing services, start-up applications and unnecessary Windows features. Its technical approach makes it an ideal alternative for users seeking in-depth control over their system.
One of the special features of DISM++ is its ability to manage Windows updates and system components. It can uninstall problematic updates, delete obsolete system files and even create system images for rapid restoration in the event of a problem. Thanks to these advanced features, it doesn’t just clean up, but also acts as a maintenance and repair tool for advanced users.
Although its interface is accessible, DISM++ is primarily aimed at users with some knowledge of system settings. Incorrect handling can have undesirable effects on Windows operation. However, for those looking for a free, comprehensive cleaning program that goes far beyond simple deletion of temporary files, DISM++ is a must-have option in 2025.
Advanced SystemCare Free: An all-in-one optimizer for Windows
Advanced SystemCare Free is optimization software for Windows developed by IObit. It cleans, speeds up and protects your PC by removing unnecessary files, optimizing system performance and enhancing personal data security. Its intuitive interface and one-click analysis mode make it accessible to all, even inexperienced users.
Among its key features, Advanced SystemCare Free offers advanced temporary file cleaning, system error repair and real-time monitoring of PC resources. It also incorporates a privacy protection module that removes browsing traces and prevents unauthorized access to sensitive data. For users wishing more advanced features, a Pro version is available with additional tools such as automatic optimization and in-depth registry cleaning.
Free of charge and compatible with all recent versions of Windows, Advanced SystemCare Free is a popular solution for keeping your PC running smoothly and securely. However, it should be used sparingly, as excessive cleaning can sometimes affect system stability.
The IT community is not a fan of the IObit brand because of intrusive advertising, rather like Avast, but IObit Advanced SystemCare Free remains a good cleaning tool.
IObit is often criticized by the IT community for its intrusive advertising and commercial practices, such as the inclusion of other software from the publisher during installation. However, despite these drawbacks, Advanced SystemCare Free remains a high-performance cleaning tool, appreciated for its effectiveness in optimizing PCs.
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