100% Free Sentinel PC Cleaner Tool - Some of the features include Disk Cleaner, Privacy Sweeper, Registry Cleaner, Internet Booster, Startup Manager, Registry Defrag, Shortcut Fixer, Disk Doctor, Win Fix, Security Holes Scanner, Process Manager, Driver Manager, IObit Security 360, Cloned Files Scanner, Disk Explorer, System Information and Empty Folder Scanner. All of these features come 100% free.