Greetings,
We wanted to let you know that with the next Game Update (tentatively scheduled for next week), PlanetSide 2 will no longer support the use of the 32-bit Operating System client. We do note, based on our internal metrics, that a very small group of folks are still using this client. We hope this doesn't prove too inconvenient to anyone impacted, and we appreciate your understanding.
Source: Official News and Announcements