How can I rename multiple files at once in Windows XP?
In Windows XP you can rename many files at once by using Windows Explorer:
1. Select all files in a folder.

2. Right click and choose Rename. You can also press F2 to rename the file.

3. Enter the new name for one of the files.

4. See how all files were renamed.

All the other files will be renamed to that name, with individual numbers in brackets to distinguish them.
Caution: Renaming files by using this method is okay if you want all the files to have exactly the SAME name. But if you have many files with different names and you simply wish to add a character to them do not use this method.