How to activate:

Go to https://www.ccleaner.com/ccleaner and download trial version
Install and Run CCleaner Professional
Go to "Option", then "About"
Click "Upgrade to Pro"
Enter the provided activation code and click Register. Please leave the "Name" field blank.
Our best-ever version combines all the features of Free with the power of automation, so your PC always stays clean, safe and fast. Includes PRO CCleaner, Recuva, Defraggler & Speccy.

Features:
Standard privacy protection
Complete PC Health Check
Updates apps to reduce security risks
Complete cleaning
Keeps your browsing history private
Detects and removes internet trackers
Keeps you from running out of space
Priority customer support