If you are running a modern 64-bit version of Windows, it is highly recommended to install the WinRAR 64-bit version for better shell integration and significantly faster compression speeds. Key Features of the Full Version
Power users use the built-in benchmark ( Tools > Benchmark ) to stress-test CPU cooling and RAM stability. If WinRAR 5.01 throws "CRC failed" errors, your hardware is unstable. WinRAR 5.01 -32bit - 64bit -full version