Searching for “Adobe Illustrator CS4 ME Portable Free 11 Exclusive” leads you to torrent sites, file upload blogs, and warez forums. Here’s what can happen if you download and run such files:

: Adobe has disabled activation servers for older versions like CS4, making legitimate installation and activation difficult or impossible on modern systems. CS4 Middle Eastern (ME) Features

Allowed for more natural, painterly vector strokes.

Unofficial "portable" or "free" downloads of Adobe software are highly likely to contain malware, spyware, or trojans