Unofficial portable versions often bypass standard installation and licensing, which can introduce malware or security vulnerabilities to your system.
Almost all portable and repacked versions of commercial software like 3ds Max are . Downloading and using them constitutes software piracy. While Autodesk is less aggressive in pursuing individual hobbyists who use old versions for learning, it is still illegal and a violation of their terms of service. Using unlicensed software in a commercial environment opens you and your company to significant legal liability. autodesk 3ds max 2009 portable top