Hagger, to help we need to know way more detail, such as:
1) What computer operating system and version are you running? (for
example WindowsXP, Mac OSX Tiger, Debian Linux)
2) Does the USB cable connect directly between the printer and the
computer or through some other device?
3) What are the exact errors you get when trying to load the drivers?
4) Have you installed an HP All-In-One on this computer before? Is
that software still installed?