I was thinking about TXT (to recognize hdds during instalation). Actually, its not 2/3 computers... I have a computer store and I want to be able to install Windows in any computer. every day new hardware and chipsets come out and I just cant add new drivers every time - and in time... not even a DVD would fit the instalation! I'm currenty using an unattended ISO to install Windows, but some (many) computers wont allow this unattended instalation because when I use the 3rd party drivers (F6) an error message appears when setup is copying first files to hard disk. I don't really remember the error code or the filename (or even if its always the same file). anyone has any idea how to work this out? appreciate