I am trying to install a print driver for a Lexmark X4580 printer onto a second computer which doesn't have a CD drive. I have copied the contents of the CD onto a USB memory stick, inserted the stick into the second computer's USB socket and tried to run the setup launcher. There is a file in the root directory called setup, which I thought would be an exe file and just need clicking on. Although I didn't need to do this with the CD, as autoplay ran it when the CD was inserted, I have tried clicking on the icon from the CD, just to try it, and it ran the setup program - so why won't it run from the memory stick, please? I have also tried Start, run D:\setup and D:\setup.exe(Windows XP). Help!