Thank you for your help.:) After I posted the question and I got no reply, I realized that I could test this by myself by loading the file and doing a byte compare with the file in the disk:cool:. At the end the files were identical so apparently there were no memory alignment issues. But I wasn't aware about FILE_FLAG_NO_BUFFERING:confused:. Either way, thank you again. // Afterall, I realized that even my comment lines have bugs If the sun were to blow up, it would take us 7-8 minutes to realize it.