AutoCAD 2013 (English, Win 64-bit EXE) is a legacy product that may be usable for specific legacy workflows but carries compatibility and security risks on modern systems. For new or production deployments, migrate to a currently supported AutoCAD release; if retention of 2013 is necessary, restrict its use to controlled environments, secure the installer source, and document activation and compatibility steps.
To ensure stable performance on Windows 64-bit systems, your hardware should meet or exceed these specifications: System Requirements for AutoCAD 2004 to 2013 - CAD Forum AutoCAD 2013 English Win 64bit Exe