CS3 was built for older operating systems; it may crash frequently on Windows 7 or newer.
Inkscape is open-source and completely free. It uses the SVG format natively but can handle Illustrator files to a degree. It offers a node-editing system very similar to Illustrator and has a massive community support base. adobe illustrator cs3 software free download for windows 7
If you need something simpler, Vectr is a free cross-platform graphics editor. It is lighter than Illustrator and great for quick logos or social media graphics. CS3 was built for older operating systems; it