If you need the functionality of AutoCAD LT 2018 but want to avoid the risks of "portable" versions, consider these legitimate options: 1. AutoCAD Web App
If you only need to view, measure, and mark up drawings on the go, the Autodesk Viewer is free and requires no installation. It is a high-performance browser tool that handles complex 64-bit files with ease. System Requirements for 2018 Versions
The term portable refers to a version of software that has been modified to run without being installed on a computer's operating system. In theory, this allows users to carry the program on a thumb drive and use it on any 64-bit Windows machine.
It is important to note that Autodesk does not officially release "portable" versions of AutoCAD LT. These versions are created by third parties using "thin-app" or virtualization technology. Using these versions carries significant risks: