In the setup program, navigate through each setup dialog as normal, except when you get to the installation folder, ** it’s vitally important to make sure you install to c:\acadlt2004 (not Program Files (x86)\AutoCAD LT 2004**.
Once the setup starts, stop and read the next step…
Read and understand all the prompts before pressing OK.
Select the 2nd tab ‘ Old AutoCAD Installer Reviver‘.
Copy your AutoCAD LT 2004 CD to your hard drive, to a folder path c:\Autodesk\acadlt2004.