你好，
你指的是商店里面直接下载的文件还是通过自己APP下载的文件？
如果是商店里面下载的文件，一般都会放在: C:\Program Files\WindowsApps 中。
如果是某个App下载的文件，要看App的开发者有没有指定存放的路径。
同时，如果想要获取更多Windows相关的信息，TechNet或许是个更好的选择（MSDN主要面向与开发）。
--James
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