1 month ago
Last edited at 1:09AM on 2/3/2014
Go to your profile by clicking on your name in the top left corner of the Facebook page. From here(your personal profile) mouse over the image you wish to change and it will give you the option to edit/change that photo. From here you can upload or choose a picture from your computer. Hope that helps!
This should cover you assuming both Cover photo and profile picture.