AutoCAD 2018 is 64-bit only . It will not install on a 32-bit operating system.
: Access settings by typing OSNAP or right-clicking the Object Snap icon in the status bar. This allows you to snap precisely to endpoints, midpoints, and intersections. autocad 2018 setup
: Type DSETTINGS in the command line or use F7 (Grid) and F8 (Ortho) to manage drawing aids. AutoCAD 2018 is 64-bit only