A: Consider QCAD (open source, 2D only) or LibreCAD . Both have true portable versions for 64-bit systems and save to .dxf .
Runs directly from the executable file.
A senior designer, who had seen the rise and fall of a dozen software cycles, handed Leo a scratched silver USB drive. "The Portable," he whispered. "AutoCAD 2010. No install, no footprint. It runs like a ghost." autocad 2010 portable 64 bits ingles
Imagine drafting a building plan for 40 hours. If your cracked portable AutoCAD crashes (which it will, often), the file recovery system is usually disabled. The .dwg file corrupts, and you lose your work. Official versions have robust recovery managers; portables do not. A: Consider QCAD (open source, 2D only) or LibreCAD