Hello CC268, and welcome to Seven Forums.
Have you already check in your Recycle Bin to see if you may be lucky to have these deleted items in it to be able to restore them from withing the Recycle Bin?
If they are not there, then you should be able to use the tutorial below to restore "Desktop" under Favorites in the navigation pane.
Favorites - Restore Default Favorite Links in Navigation Pane
Hope this helps,