is the biggest hurdle. Because it relies on older versions of .NET Framework (specifically 3.5) and DirectX, you may need to: Enable .NET 3.5:
If you are using the "updated" 2009 as your daily driver but receive modern files: autocad2009 updated
While 2009 had low requirements, modern systems with 16 GB to 32 GB of RAM will allow you to keep massive 2D project files open with zero lag. is the biggest hurdle