By window files, do you mean Windows files? And can you be more specific about what these files are? Its impossible to answer the question without knowing more. If youre talking about something like images or documents, you should have no problem. But if youre talking about programs, then thats a different story. You would need Windows to run those (although Crossover has some products for running Windows software, but I dont know much about those). VMWare can run Windows inside of OS X, but you would still need an actual copy of Windows to do so. If you run Windows inside VMWare, you can, of course, run Windows programs inside Windows.