How to rename files in Windows
You can rename files simply by right-clicking on the file and then selecting Rename. The name of the file will be highlighted in blue and you can just typing a new file name, then press Enter to make it set.
You can also rename a file by clicking on the file, waiting a second, then clicking on the file name. (If you click on the icon of the folder or file, nothing will happen.) The file name will then change to be highlighted in blue where you can just type the new file name and press Enter to set it.
If you pick a name that has already been used in that folder (you can have multiple files with the same name, but they have to be in different folders), Windows will warn you and offer to change the name of the new file to end in (1) or whatever number.
This same procedure can be used to rename folders. With Vista and newer, the files and folders will automatically move to alphabetical order. If you don’t want to lose your place, instead of pressing Enter, just click on the next file and your highlight will stay there, instead of moving with the renamed folder.