While I understand you are looking to find a portable version of AutoCAD 2016 for 64-bit systems, it is important to clarify a few things about how this software works. Autodesk does not officially release or support "portable" versions of AutoCAD. These versions are typically modified by third parties, which carries significant risks regarding system stability, legal licensing, and malware.

Option 1: AutoCAD Web App (Free for Basic Viewing)

Autodesk offers a browser-based AutoCAD. It runs on any machine (Chromebook, library PC) and requires no installation. The free tier allows viewing, markup, and light editing. The paid subscription ($10/day) adds full editing.

Troubleshooting

Part 4: "Installation" & Setup Process

Since a portable version is not "installed" in the traditional sense, here is how it is typically deployed:

• Improved 3D Modeling: Enhanced 3D modeling tools, including extrusions, sweeps, and lofts.
• Advanced Annotation: Improved annotation tools, including text, dimensions, and leaders.
• Streamlined Interface: A more intuitive and customizable interface.

• Hardcoded license file (adskflex.lic) or
• Patching adlmint.dll or
• Registry redirection via sandbox tools like Spoon/Sandboxie (now open-source).

1. No Administrative Rights Needed

Many corporate or university PCs lock down installation privileges. A portable version could (theoretically) run from an external drive without admin approval.

The AutoCAD 2016 Portable 64-bit version is a powerful tool for professionals who need flexibility. By eliminating the bulky installation process, it allows you to focus on what matters: your designs. Whether you're a student moving between computer labs or a freelancer on the go, this portable solution ensures your workspace is always in your pocket.

If you need a portable CAD tool for occasional use, try LibreCAD Portable (via PortableApps.com) – it's legal, safe, and free.