First, choose a reliable PC cleaning software like CCleaner. Install the software and run a system scan to identify unnecessary files such as temporary files, junk files, and unused data.

Download CCleaner for FREE. Clean your PC of temporary files, tracking cookies, browser junk and more! Get the latest version today.

Try CCleaner Professional for free. Automate your PC & browser cleaning and privacy protection - latest version.

This page explains what the Windows Registry is, why CCleaner cleans it, and how to clean it. To skip to instructions for Registry > Registry Cleaner, go to Clean your Registry with CCleaner for Windows …

CCleaner is the number-one tool for cleaning your PC. It protects your privacy and makes your computer faster and more secure! Download it FREE today.

Try CCleaner Professional for FREE. Automate your PC & browser cleaning and privacy protection - Get the latest version today.

Download CCleaner for FREE. Clean your PC of temporary files, tracking cookies, browser junk and more! Get the latest version today.

Download CCleaner for free. Clean your PC of temporary files, tracking cookies and browser junk! Get the latest version here.

Custom Clean is a function within CCleaner that allows you to customize how the app cleans different parts of your PC, such as your operating system and applications (like web browsers).

Oct 14, 2025 · My CCleaner was recently updated but now I get an error message: [Cleaner is still busy with something else] and it has been like this for days and will not clean the computer as before.