How to rename in sequence multiple files winthin second

this is very cheap tip i brought for you.how to rename multiple files in sequence for example file1,file2,file3...

this is very simple.just follow the steps 

Step 1: Go to your folder which containing your files.

Step 2: Select all these files and right click on it go to rename option.rename the file now the remaining files will automatically renames like file1,file2,file3....