Win10

1. 新建一个文本文件“1.txt”

2. 在“1.txt”中添加如下代码，并保存：

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

3. 修改“1.txt”为“1.reg”

4. 双击运行“1.reg”