Xf — Adsk2014 X64 74

The "X64" signifies it is built for 64-bit operating systems.

AutoCAD 2014-based products crash during launch on Windows 10 Xf Adsk2014 X64 74

The term represents a "key generator" (keygen) created by the X-Force group. It is designed to generate activation codes for Autodesk products released in 2014, such as AutoCAD 2014 , Revit, and Inventor. The "X64" signifies it is built for 64-bit operating systems