Notepad2 4.1.24 fails to start with KernelEx 4.5 Final. It depends on PathUnExpandEnvStringsW from SHLWAPI.dll, which isn't found. If KernelEx could implement it and support Notepad2 I'd be one happy camper. :)
There's nothing that needs to be added. Just install Microsoft Internet Explorer 6.0 SP1 update and you'll get it working.