Grab the ACD/ChemSketch Freeware . It handles the same file types and is much more stable on today's hardware.
However, if you are looking for powerful chemical structure drawing tools without the headache of tracking down an old serial key, here are the best modern (and legal) ways to go about it: 1. The Modern Successor: KnowItAll chemwindow 70 download free exclusive
Excellent for both 2D and 3D modeling; free for individual academic use. Grab the ACD/ChemSketch Freeware
A great web-based option if you don't want to install anything at all. Why avoid the "Free Download" sites? The Modern Successor: KnowItAll Excellent for both 2D
If you just need to draw structures for a paper or lab report right now, these are incredible, free, and won't put your computer at risk:
Old software like ChemWindow 7.0 was built for Windows 98 or XP. Even if you find a "cracked" version, it will likely crash on a modern PC or contain security vulnerabilities.