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The 6.00 release introduced "Performance Optimizer," a feature designed to freeze background apps to free up system resources. Key updates included: For those looking for a completely free, open-source
: Available at no cost on the official CCleaner download page . It includes standard privacy protection and system cleaning. For those looking for a completely free, open-source
: If you previously purchased CCleaner and lost your key, use the License Lookup tool to retrieve it. For those looking for a completely free, open-source