Windows could not start the IIS Admin Service on Local Computer. For more information, review the System Event Log. If this is a non-Microsoft service, contact the service vendor, and refer to service-specific error code -2147417831.
Event log is not much help:
The IIS Admin Service service terminated with service-specific error 2147549465 (0x80010119).
Kill the inetinfo.exe process and start IIS again - that's it :)