Hey HetmanPolny,
Welcome to the forums and thanks for joining us! While 32-bit systems is not officially supported, it is still possible to run the game. However you may come across crashes while playing. If you do, please refer to this post about 32-bit OS. http://forums.obsidian.net/topic/72049-workarounds-for-several-known-issues-4-07-15/
Thank you for your support!