An x64 file is an executable file compiled for a 64-bit processor architecture, specifically the x86-64 instruction set (also known as AMD64 or Intel 64). These files contain machine code instructions that the operating system loads into memory and executes. They are designed to run on 64-bit versions of operating systems like Windows, macOS, and Linux. Executables contain the program's code, data, and resources necessary for it to function. They often require specific libraries or dependencies to be present on the system for proper execution. Running an x64 executable on a 32-bit system is generally not possible due to the different instruction set and memory addressing capabilities. The x64 architecture allows for significantly larger memory addressing compared to 32-bit systems, enabling applications to utilize more RAM and handle larger datasets. These files are crucial for running software applications on modern computers.