Since Adobe has removed the CS5 download links from their direct servers, the most reliable source for legacy installers is often community archives. Internet Archive (archive.org)
A 32-bit version of Windows 7 can only address a maximum of 4 GB of RAM (Random Access Memory). In practice, the usable amount is often between 2.5 GB and 3.5 GB. Adobe Illustrator CS5, while powerful for its time, is memory-hungry. On a 32-bit system: Adobe Illustrator Cs5 Windows 7 32 Bit Download
Adobe Illustrator CS5 on Windows 7 32-bit is a testament to a time when software was a tool you owned, not a service you rented. It is stable, it is fast, and it gets the job done. Since Adobe has removed the CS5 download links