Enter your (exactly as it appears in your confirmation email) and your License Key [5.4, 5.8, 5.14].
Do you need help for a specific email address, or
This is the most common source. Look for an email sent immediately after your purchase [5.3, 5.4, 5.9].
Click the or Register button on the main window, or go to Settings > Subscription [5.3]. Paste your activation code and click Activate [5.3]. Security Warning: Avoiding "Free" License Keys
Pirated versions can install backdoors to your system [5.7, 5.33].
To move your license to a new computer, simply install the free version on the new device and enter your existing key [5.16].
For a safe experience, always purchase your license through the Official CCleaner Website or authorized retailers like Kinguin [5.25]. Quick Troubleshooting
This usually happens if you have a new replacement key or if the license was used on more devices than allowed [5.6].
Enter your (exactly as it appears in your confirmation email) and your License Key [5.4, 5.8, 5.14].
Do you need help for a specific email address, or
This is the most common source. Look for an email sent immediately after your purchase [5.3, 5.4, 5.9].
Click the or Register button on the main window, or go to Settings > Subscription [5.3]. Paste your activation code and click Activate [5.3]. Security Warning: Avoiding "Free" License Keys
Pirated versions can install backdoors to your system [5.7, 5.33].
To move your license to a new computer, simply install the free version on the new device and enter your existing key [5.16].
For a safe experience, always purchase your license through the Official CCleaner Website or authorized retailers like Kinguin [5.25]. Quick Troubleshooting
This usually happens if you have a new replacement key or if the license was used on more devices than allowed [5.6].