This tutorial will show you different ways to rename a file in Windows 10.
If a file is currently in use, for example by a program, Windows will not allow you to rename it.
If you rename more than one file at the same time, the new name for each folder will be new file name, new file name (1), new file name (2), etc…
Be careful to not change the file extension of a file when renaming the file. Doing so will change its file type, and break the file until the extension is changed back.