近日，笔者由于需要安装一款个人非常喜欢的PDF浏览器Xodo，只能在Microsoft Store下载。但是，却无法打开，给出提示：The store app is blocked. (0x800704EC)。查百度经验，降低Internet选项安全等级、取消局域网代理设置，仍不奏效。

后来，在Microsoft Community检索到了，提示修改注册表参数：

HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\RemoveWindowsStoreis already set to 0. But I search for RemoveWindowsStoreand found another key with the same name inHKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowStore\ which was set to 1. By setting it to 0 solves my problem.

照做后，问题解决。