Problem editing a docx-file in libreoffice after creating it on desktop

Hello everyone!

I am using libre office on windows 8.1 (x64). I installed both ms office 2010 and libre office.
I encountered following problem. If I create a new word document on desktop, it is automaticly docx but it loads in libre office. So far no problem. BUT if I write in russian and try to save the document and close it, It shows only question marks instad of russian letters. My first and most important question therefore is: is there any possibility to recovere such a file, so that I regain the information?