If you venture into the dark corners of torrent sites, forum links, and file-hosters (Mediafire, Mega, 4shared) to search for "Adobe Illustrator CS6 Portable Highly Compressed Free," you will find one of three things:
While the benefits of "free" and "portable" are tempting, there are significant downsides to using these modified versions: Adobe Illustrator Cs6 Portable Highly Compressed Free