Specific methods
1. When saving a file, you can use the method of automatically assigning a name by the system. That is, let it default to whatever name the system displays when saving. Such a name will not be duplicated, and it will be saved very quickly.
2. Select all the files that need to be renamed in the folder, just press the key combination ctrl+a, then press F2, then enter the name you want to set, and the system will assign a number after the name.
The above is how to batch rename files in Win7. As long as you select multiple files at the same time and make changes to the first file, the subsequent files will be automatically renamed.