Frequently Asked Questions (FAQs)View the questions users most frequently ask about CCleaner. We recommend you read this before looking in other sections. |
Product SetupA 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. |
Community ForumJoin 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 CCleanerWhy do I need to optimize my computer? |
Product Setup |
Using CCleaner |
OtherI've lost my product license key |
About CCleaner for Mac |
Product Setup |
Using CCleaner for Mac |
OtherI've lost my product license key |
About CCleaner Network Edition |
Product SetupInstallation of trial software Registering the Management Service |
Using CCleaner Network EditionWhat do the different colored Endpoint icons mean? CCleaner Network manual license activation |
OtherRemote installation fails on Windows 8 and 2012 What communication ports are required? |