Despite the risks, the search persists. Why?
In the context of "repacks," the software is usually pre-cracked or includes a "silent" activation script. portableautodeskautocad2010lite repack
nanoCAD by Nanosoft offers a free version with core AutoCAD-like functionality. The installer is under 200 MB. While not officially portable, you can install it to a USB drive with some customization. Despite the risks, the search persists