: Automatically analyzes and tunes up your PC performance.
: You can verify your version by looking at the top of the application window. The most recent major releases include version 6.x . 2. Activating Professional (If you have a key) : Automatically analyzes and tunes up your PC performance
: Get the installer directly from the official download page. : Automatically analyzes and tunes up your PC performance
Open CCleaner and click on in the bottom-left corner. Select My Subscription or Subscriptions . Click Enter license key or find the Activation Code box. Paste your key and click Activate . 3. Using Professional Features : Automatically analyzes and tunes up your PC performance
If you don't want to pay for Professional but need similar functionality: