If you see a "registration key" that claims to unlock a "free forever" version, it is fraudulent. Legitimate free alternatives exist (e.g., CCleaner Free, BleachBit, Windows built-in Disk Cleanup), but they are not WinZip System Utilities Suite.
You can replicate 80% of the suite’s functionality with freeware: | WinZip Feature | Free Alternative | |----------------|------------------| | Registry Cleaner | Wise Registry Cleaner (Free) | | Disk Cleaner | BleachBit (Open Source) | | Duplicate Finder | dupeGuru (Free) | | Startup Manager | Autoruns (Microsoft) | | Privacy Eraser | Privacy Eraser Free | registration key for winzip system utilities suite link