If you want the speed of CS3 without the malware risk, try these:
Adobe Illustrator Portable CS3 is a portable version of the popular vector graphics editor, Adobe Illustrator CS3. The "portable" version means that the software can be run from a USB drive or other portable storage device, without requiring installation on a computer. adobe illustrator portable cs3
No registry edits. No background services. No Adobe Creative Cloud bloatware. If you want the speed of CS3 without
The "portable" version of Illustrator CS3 is a modified, unofficial build of the original software released in 2007. Unlike standard versions, these builds are designed to run without a traditional installation process, typically storing all settings and temporary files in a single folder or on a removable drive. No background services
This is the big one. Some designers are tired of paying $60/mo for tools they use twice a week. CS3 is "abandonware" at this point. You pay once (if you buy a vintage disk) or... you find the portable version. It does not phone home to Adobe.