Adobe Connect usually works on most computers without any installations. However, for the best results, following requirements are recommended.
internet connection (Wi-Fi or wired) + internet browser (Firefox, Internet Explorer, Chrome)
Flash Player (version 10 and higher) - program can be downloaded here for free
speakers connected to PC (or integrated into display, laptop, headset …)
A simple test can help you with checking requirements.
Adobe Connect webinars can be easily accessed via mobile devices (tablets, smartphones). Apps for Android, iOS (Apple) or Blackberry are freely available.