The usual run of the mill vga cable
Never let me down before.
Its Windows 7, I think
I had to get shot of it and go back to Vista, as it wouldn't let me on. Just kept "forgetting" it had the drivers and limited me to less resolution options than Windows 95 gave me.....
Just that damn floating white note on a black background with "Optimum Mode" was 1680x1050 - the very resolution I had been trying to put on !