If there is no printer driver or the font is not installed, this does happen. This is not a bug.
Whenever I open MS-words 2007 professional, the font automatically changes to a font type that I do not want. I have changed the default font several times, but the problems still persists. I also uninstalled the MS words version and tried to solve the problem by reinstalling it, but in vain. It is surprising though, that the same software works perfectly well in my other computer.
I am sorry if this is not the right forum. But since the problem occurs in Windows 7, I am posting it here. I could not find any other relevant place.