Portable versions can run directly from a USB or a non-write-protected folder, leaving no registry footprint on the host machine. Offline Capability:

Note: This section explains the technical process used by repackers. For a legitimate experience, use Autodesk’s free web-based AutoCAD (AutoCAD Web) or a licensed portable alternative.

Standard AutoCAD installations write deep into the Windows Registry and AppData folders. If you simply drag a new version over an old one on a portable drive, you will likely encounter: