Lexmark T644 Printer Drivers and Software for Microsoft Windows and Macintosh OS. Lexmark T644 Review: High speed performance for high-performance teams with serious business goals. Lexmark T644 Driver Downloads Operating System(s): Windows 7 (64-bit), Windows 7 (32-bit), Windows 8 (32-bit), Windows 8 (64-bit), Windows Server 2012 (64-bit), Windows 8.1 (32-bit), Windows 8.1 (64-bit), Windows Server 2012 … Continue reading Lexmark T644 Driver