Adobe officially ended support for Creative Suite 5 years ago.
This site historically maintained a list of Direct Download Links for Adobe CS5 . Note that these often require a specific browser cookie from Adobe's site to work. System Requirements for CS5 (32-bit) adobe dreamweaver cs5 free download for windows 7 32 bit
Because CS5 is outdated and lacks modern security updates, you might consider these free, high-performance alternatives that run well on older Windows 7 32-bit systems: Download Dreamweaver Cs 5.5 | Community Adobe officially ended support for Creative Suite 5
While you can no longer buy a new license for CS5, you can still find official installers for archival purposes or trial the newest version of the software. you might consider these free