While modern AutoCAD versions can open older files, saving back to older formats can sometimes cause geometry issues. Working natively in AutoCAD 2014 ensures that you are creating files that are perfectly compatible with partners or clients still running older systems.
A: Yes, if you have a standalone perpetual license. You must deactivate it on the old machine before installing on a new one (via License Transfer Utility). Autodesk AutoCAD 2014 Download
If you have exhausted legitimate options and cannot get an official installer, consider these alternatives: While modern AutoCAD versions can open older files,