It is not clear if your 'explorer.exe' has stopped or your desktop icons have simply disappeared. Is the taskbar (start menu's bar) visible?
If your explorer has stopped,
go to task manager (control + alt + delete) --> Go to NEW TASK --> click BROWSE --> paste C:\Windows\explorer.exe on the path bar.
If your icons have disappeared right click your start menu and choose the icons you want on your desktop.
If your icons have been hidden,
on an explorer window,
click Organise --> folder and search options --> View menu --> Select the 'SHOW HIDDEN FILES AND FOLDERS' and click apply.