x64版本的Windows Media Encoder 9是一款视频音频编码工具，64位版本的Windows Media Encoder能够充分利用x64平台的特性来进行高音质的多声道与高清视频的编码。

Not sure if your installed version of Windows is 32-bit or 64-bit? One quick way to tell is by looking at information about your operating system installation in Control Panel.