Stealing login credentials, passwords, and banking information.

If you only need to view, measure, and plot/print .dwg files, DWG TrueView is 100% free and officially portable (you can install it to a USB drive using the command line: TrueView.exe /quiet /install /installpath="D:\TrueView" ).

Instead of a portable app, create a portable operating system.

These tools package the application along with a virtual file system and a virtual registry. When you launch the portable executable, it redirects all read and write operations to its own isolated environment rather than modifying the host computer's system files. Key Features of AutoCAD 2015

If you need AutoCAD 2015 on the go, buy a low-cost refurbished laptop, install the legit software, and keep it offline. Or embrace cloud-based viewers for collaboration. The $1,775 (value of a single AutoCAD subscription) you might "save" with a portable crack is nothing compared to the cost of a ransomware attack, a failed project deadline, or a piracy lawsuit.