However, the world has moved on. WebAssembly, cloud computing, and lightweight Electron apps are the new "portable." If you absolutely need ArtCAM 2012 specifically, buy an old laptop, install it properly, and don't connect it to the internet. That LinuxCNC box doesn't need to be online anyway.
Artcam Pro 2012 Portable is a 32-bit software application developed by Delcam, a leading provider of CAD/CAM software. The software is designed to work on Windows-based systems and can be run from a USB drive, making it a highly portable solution. Artcam Pro 2012 Portable offers a comprehensive set of tools for designing and manufacturing complex parts, including 2D and 3D modeling, machining, and simulation. artcam pro 2012 portable