Hi @usamaniaziofficial,
Thanks for your interest in using Bitnami. Can you give us more information on which stack and version are you downloading? Maybe we can provide you with an old installer with 32-bits support.
We dropped Windows 32-bits support because some tools (Apache, PHP, MySQL, etc...) doesn't provide support for it. Operating systems are also dropping 32-bits supports due to the limitations it implies.