If you are trying to import MBOX to Windows Live Mail client then download and try eSoftTools MBOX Converter Tool which is 100% risk free and also you can import MBOX file to any other file like PST, EML, MSG, EMLX, and NSF in just few steps using this software. Many people have used this and they have got great results so download this and try its free demo.

Read More:- Import MBOX into Windows Live Mail Client