The "free download" you find on random blogs is likely unsafe and technically obsolete.

You're looking for a free download of ChemWindow 6.0.

Yes, with compatibility mode and legacy components enabled (see Part 4). But expect occasional graphical glitches, especially with the spectrum overlay tool.

: A full-featured desktop application for Windows. It allows for 2D/3D structure drawing, molecular property calculations, and is free for non-commercial/academic use.

While ChemWindow 6.0 remains a nostalgic favorite for many chemists and students, it is important to address its availability and modern alternatives within the context of today’s software landscape. What was ChemWindow 6.0?