A. A. If you have TweakUI click the Desktop tab and check the "Inbox" and click Apply then OK. If you do not have TweakUI you can re-add by directly updating the Registry:

  1. Start the Registry editor (regedit.exe)
  2. Move to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
  3. From the Edit menu select New - Key
  4. Enter a name of "\{00020D75-0000-0000-C000-000000000046\}"
  5. Select the new key and double click on (Default). Set to "Inbox" and click OK
  6. Close the registry editor
  7. Press F5 on the desktop for the Inbox icon to appear