Valve's December update for the Steam client has transitioned the Windows version to a fully 64-bit application, ending partial 32-bit support. This change allows for improved performance and stability, as 64-bit applications can access greater system memory and manage larger tasks more effectively. Most Steam users on Windows, who already use a 64-bit operating system, will experience a seamless update. However, support for 32-bit Windows will continue only until January 1, 2026, after which it will cease. The update also includes enhancements such as improved reporting of suspicious messages, fixes for Big Picture Mode and Remote Play, and expanded controller support, including for Nintendo Switch 2 and GameCube controllers. Users on 64-bit Windows 10 or 11 will have the update installed automatically, while those on 32-bit systems must transition to a 64-bit version to continue using Steam after the cutoff date.