Using keygens to bypass software licensing is a violation of the End User License Agreement (EULA) and is considered software piracy. This information is provided for educational purposes to explain how the process historically worked. Autodesk's official stance is to purchase a legitimate license.
While the temptation is understandable, the risks of downloading and installing cracked software are catastrophic and far outweigh any benefit. Autocad 2006 with key full version
Windows XP (Home or Professional), Windows 2000 (SP4) Using keygens to bypass software licensing is a