This is the most common fake. The download contains an installer that looks like a portable app but writes deeply to the registry. When you "uninstall," it leaves thousands of orphaned registry keys. This is not portable; it's just a cracked installer packaged with a portable wrapper (like Thinstall or VMware ThinApp).
AutoCAD 2009 was built for and early Windows Vista . It barely works on Windows 10, let alone Windows 11. Portable Autodesk AutoCAD 2009
: You can access your drawings from any browser without installing software. Check the AutoCAD Web page for features. This is the most common fake