由于法律原因，在欧洲销售的 Windows N 版本的 XP/Vista/7/8/10 不带多媒体组件。这阻止了 MP3 播放以及 WMA 播放和标记（在这两种情况下，文件在尝试播放时都会变成灰色）。
为了解决这个问题：
1) 如果您需要使用 WMA 和许多其他编解码器，请按照以下文章中的说明安装 Windows Media 组件（请密切注意，因为说明因操作系统以及操作系统内的不同版本而异）：
Windows 8/8.1/10 ： https://support.microsoft.com/en-gb/help/3145500/media-feature-pack-list-for-windows-n-editions
Windows 7 / XP：可能托管于： https://www.microsoft.com/en-us/download/windows-media-player-details.aspx
2) 如果 WMA 文件仍然无法播放，您可能需要安装 Windows Media Format Runtime：
Windows XP/2003/Vista ： http://www.mediamonkey.com/sw/WMFDist11-WindowsXP-X86-ENU.exe
3) 如果您不使用 WMA，最简单的方法是安装MP3 编解码器，但是，此方法不适用于路径/文件名中带有 unicode 的文件。
Windows N Editions of XP/Vista/7/8/10 that are sold in Europe without multimedia components for legal reasons. This prevents MP3 playback, along with WMA playback and tagging (in both cases the files will become grey on attempts to play them).
In order to resolve this:
1) If you require the use of WMA and many other codecs, then install Windows Media components as indicated in the articles below (pay close attention as the instructions differ by OS and by versions within an OS):
Windows 8/8.1/10: https://support.microsoft.com/en-gb/help/3145500/media-feature-pack-list-for-windows-n-editions
Windows 7 / XP: May be hosted at: https://www.microsoft.com/en-us/download/windows-media-player-details.aspx
2) If WMA files still fail to play, you may need to install the Windows Media Format Runtime:
Windows XP/2003/Vista: http://www.mediamonkey.com/sw/WMFDist11-WindowsXP-X86-ENU.exe
3) If you don’t use WMA, the simplest approach is to install an MP3 codec however, this approach will not work for files with unicode in the path/filename.
Applies to: MMW4, MMW5+
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