win10/11打开未知文件/打开方式提示该文件没有与之关联的应用来执行该操作。请安装应用，若已经安装应用，请在"默认应用设置”页面中创建关联解决方法win10打开未知格式文件，选择打开方式，对于未知格式，虽然有各种软件可以选，但是没有图下选项，不能将该未知格式与应用绑定为默认打开方式。解决很简单，打开注册表，导入如下脚本即可。查看是否导入成功的路径为计算机\HKEY_CLASSES_ROOT\Unknown\shell\openas，脚本：1.regWindows Registry Editor Version 5.00[HKEY_CLASSES_ROOT\Unknown\shell\openas]@=hex(2):40,00,25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,\ 00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,00,\ 68,00,65,00,6c,00,6c,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,2c,00,2d,00,35,\ 00,33,00,37,00,36,00,00,00"MultiSelectModel"="Single"[HKEY_CLASSES_ROOT\Unknown\shell\openas\command]@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\ 00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,4f,00,70,00,\ 65,00,6e,00,57,00,69,00,74,00,68,00,2e,00,65,00,78,00,65,00,20,00,22,00,25,\ 00,31,00,22,00,00,00"DelegateExecute"="{e44e9428-bdbc-4987-a099-40dc8fd255e7}"2.regWindows Registry Editor Version 5.00[HKEY_CLASSES_ROOT\Unknown\shell\OpenWithSetDefaultOn]"MultiSelectModel"="Single""ProgrammaticAccessOnly"=""[HKEY_CLASSES_ROOT\Unknown\shell\OpenWithSetDefaultOn\command]@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\ 00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,4f,00,70,00,\ 65,00,6e,00,57,00,69,00,74,00,68,00,2e,00,65,00,78,00,65,00,20,00,2d,00,6f,\ 00,76,00,65,00,72,00,72,00,69,00,64,00,65,00,20,00,22,00,25,00,31,00,22,00,\ 00,00"DelegateExecute"="{e44e9428-bdbc-4987-a099-40dc8fd255e7}"保存为.reg文件后，图标会变成注册表的样子。双击打开它们，导入到注册表即可。注册表里可以看到，已经成功导入了。打开方式-选择其他应用，就可以愉快设置默认打开应用了。https://blog.csdn.net/no_say_you_know/article/details/126803343