I have no file of explorer.exe in regedit

Hello,
hi hello my problem is i have formatted my computer for the same problem that my desktop icons and start menu is not available on my destop only y background is visible and i can use only my task manager so i tryed to delete the explorer.exe file in HKEY_LOCAL_MACHINE\SOFTWARE\IMAGE FILE EXECUTION OPTION\explorer.exe but there is no file present so what to do now , i dont want to repeat this problem in my computer again ,so please give solution