Always run any .exe or .rar file through VirusTotal before opening it.

: Tools like the Longbow Converter can help modify the original 32-bit installer to function on 64-bit modern Windows versions. System Requirements (2006 Release) AutoCAD 2006 Installation Guide for Windows 7, 10, and More

For completeness, if you have a valid license and an old Windows XP or Windows 7 PC:

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Autocad 2006 Portable Download Pc Link [upd] File

Always run any .exe or .rar file through VirusTotal before opening it.

: Tools like the Longbow Converter can help modify the original 32-bit installer to function on 64-bit modern Windows versions. System Requirements (2006 Release) AutoCAD 2006 Installation Guide for Windows 7, 10, and More

For completeness, if you have a valid license and an old Windows XP or Windows 7 PC: