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Frequently Asked Questions (FAQs)

View the questions users most frequently ask about CCleaner. We recommend you read this before looking in other sections.

Product Setup

A full set of detailed documentation is available at ccleaner.com/docs. You'll find how-to's, tips and tricks, and technical information for power users.

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Join our community forums at forum.ccleaner.com to chat with fellow users and get answers to your questions.

Lost product license key?

If you have lost your CCleaner Professional license key or download link, use our license lookup tool to retrieve them.

About CCleaner

Why do I need to optimize my computer?

Benefits of CCleaner Professional

What is CCleaner Professional Plus?

Product Setup

How do I download CCleaner?

Problems registering CCleaner Professional

Using CCleaner

Running CCleaner for the first time

Using the Drive Wiper

Other

I've lost my product license key

I have a bug report or feature suggestion

Change my account password

About CCleaner for Mac

What files does CCleaner for Mac clean?

What are the OS requirements?

Can you create an iOS app?

Product Setup

How do I download CCleaner for Mac?

How do I update CCleaner for Mac?

Using CCleaner for Mac

Learning how to use CCleaner for Mac

Other

I've lost my product license key

I have a bug report or feature suggestion

Change my account password

About CCleaner Network Edition

CCleaner Network Edition Overview

CCleaner Network Licensing

Product Setup

Installation of trial software

Registering the Management Service

Connecting to a Management Service for the first time

Deploying the Endpoint Agent

Using CCleaner Network Edition

What do the different colored Endpoint icons mean?

CCleaner Network manual license activation

Understanding the Architecture

CCleaner Network - Initial Troubleshooting

Other

Remote installation fails on Windows 8 and 2012

What communication ports are required?

Adding computers with Active Directory

How to change the Management Service password