If you specifically need CS4 for historical or preservation purposes, some community-driven archives host original installers. Is Adobe Flash Professional free after is dead? | Community
To run Adobe Flash CS4 Portable, you'll need: adobe flash cs4 portable download free exclusive
: Unofficial "portable" versions are often bundled with malware, viruses, or spyware. Hackers frequently use "Flash update" or "free download" scams to infect computers. If you specifically need CS4 for historical or
: Adobe shut down the CS4 activation servers years ago. Even with a legitimate serial number, software often cannot be activated beyond a 30-day trial. Hackers frequently use "Flash update" or "free download"
: Adobe has shut down the original activation servers for Creative Suite 4. If you have a legitimate license, you may need to contact Adobe support or check for an "activation-free" version they occasionally provided to existing owners. Operating System Compatibility