Valve has shipped a long-awaited change to the Steam client on Windows. As of the December update, Steam now runs as a fully 64-bit application on supported systems, ending years of partial 32-bit support and aligning the client with the modern Windows environment.
The change applies to 64-bit installations of Windows 10 and Windows 11. Systems still running 32-bit Windows are not shut down immediately, but Valve has set a clear end date for support.
what changed?
The Windows version of the Steam client is now fully 64-bit. Previously, parts of the client remained 32-bit even on 64-bit systems, a legacy setup that limited how much memory the application could use efficiently and hindered future development.
With this update, Steam matches the architecture already used on other platforms and removes the technical ceiling that has existed for years.
Who is affected by the update?
The majority of Steam users are on Windows, and most of those systems already run a 64-bit version of the operating system. For these users, no action is required. Steam updates automatically and continues to function normally.
Users still on 32-bit Windows should pay attention to Valve's timeline. Steam will continue to receive updates only on 32-bit Windows 1 January 2026After that date, clients will no longer receive support on those systems,
Valve has not announced any extensions or exceptions to this cutoff.
How does it matter?
The benefits of a 64-bit client are practical rather than dramatic. Steam isn't suddenly faster across the board, and Valve hasn't claimed big performance gains.
What changes is the foundation. A 64-bit application can access more system memory, handle larger workloads more reliably, and avoid some of the stability problems that affect long-running processes. For a client that manages game downloads, overlays, chat, input devices, and background services, that headroom matters.
More importantly, this change removes limitations that would complicate future updates. Features that would have been awkward or impossible under mixed 32-bit support can now be developed without the constraints of legacy.
Other notable improvements in the December update
The 64-bit transition is the headline change, but it's not the only change included in the update.
Steam Friends and Chat now allows users to report suspicious or harassing messages directly from within the chat window. This ends a long-standing gap where restraint actions required walking away from the conversation.
Valve also addressed a set of issues affecting Big Picture Mode and Remote Play, improving reliability in scenarios that are sensitive to client crashes or memory limitations.
Controller support saw several additions and improvements. Steam Input now supports Nintendo Switch 2 controllers over USB on Windows, as well as the GameCube adapter working in Wii U mode with Rumble support. The update also addresses pairing and configuration issues affecting the DualSense Edge, Xbox Elite, and Nintendo Joy-Con controllers.
These changes are incremental, but they target areas where Steam serves as infrastructure rather than a simple storefront.
What should users do now?
For users on Windows 10 or Windows 11 with a 64-bit installation, there is nothing to configure. The update installs automatically and runs in the background.
Users still on 32-bit Windows should consider the January 1, 2026 cutoff as a fixed deadline. Continuing to use Steam beyond that point will require moving to a 64-bit version of Windows, as Valve has not indicated plans to maintain legacy builds.
The December update doesn't change Steam's system requirements for the game, but it does mark a sweeping change from the older platform.
