win 10默认将照片查看器关闭了，打开图片默认变成了画图，我们可以采用以下方法，将图片查看器重新开启。
新建一个文本文档，写入如下内容并保存，将扩展名更改为.reg，双击进行导入，重启电脑即可。

Windows Registry Editor Version 5.00; Change Extension's File Type[HKEY_CURRENT_USER\Software\Classes\.jpg]@="PhotoViewer.FileAssoc.Tiff"; Change Extension's File Type[HKEY_CURRENT_USER\Software\Classes\.jpeg]@="PhotoViewer.FileAssoc.Tiff"; Change Extension's File Type[HKEY_CURRENT_USER\Software\Classes\.gif]@="PhotoViewer.FileAssoc.Tiff"; Change Extension's File Type[HKEY_CURRENT_USER\Software\Classes\.png]@="PhotoViewer.FileAssoc.Tiff"; Change Extension's File Type[HKEY_CURRENT_USER\Software\Classes\.bmp]@="PhotoViewer.FileAssoc.Tiff"; Change Extension's File Type[HKEY_CURRENT_USER\Software\Classes\.tiff]@="PhotoViewer.FileAssoc.Tiff"; Change Extension's File Type[HKEY_CURRENT_USER\Software\Classes\.ico]@="PhotoViewer.FileAssoc.Tiff"