Difference between product key and activation code - Microsoft Support

: Open the downloader, go to the menu bar, click the program name, and choose Preferences → Enter your activation key . 3. Common Activation Issues and Solutions FAQ and Support - DVDVideoSoft.com

Websites that distribute cracks and keygens are notorious breeding grounds for malware. Hackers often bundle trojans, spyware, and ransomware inside these "free" software files. By downloading an executable file claiming to be a "key generator," you are potentially handing over control of your computer to cybercriminals.