Illustrator CS5 was engineered for Windows 7 and older macOS versions. Running a modified, unpatched version of CS5 on modern operating systems like Windows 10 or Windows 11 often results in catastrophic compatibility errors. You may encounter display scaling glitches, mouse tracking lag, or a complete refusal of the software to launch. 4. Legal and Ethical Risks
: You lose out on cloud syncing, advanced Typography tools, and the massive AI-driven "Generative Fill" features found in the current CC versions. Screen Scaling Issues
Windows XP (SP3), Windows Vista, or Windows 7/8/10/11 (32-bit or 64-bit). Processor: Intel Pentium 4 or AMD Athlon 64. RAM: 1 GB (2 GB recommended).