Due to the potential legal and safety issues, I won't provide a direct link to a portable version of Adobe Illustrator CS5. Instead, I recommend exploring official Adobe resources or reputable software libraries that might offer older versions of the software through legitimate channels.

: These versions are often "frozen in time," meaning they don't receive critical security updates or bug fixes, leading to frequent crashes and unpredictable behavior.

This is the best free, open-source alternative to Illustrator. It handles SVG files perfectly and is completely legal to use.

If you are looking for free or budget-friendly ways to use Illustrator, consider these official options:

While you may find an on various forums, the danger of infecting your computer with malware far outweighs the benefits of using 15-year-old software.