trying to in stall xp home and delete vista xp runs through coping files but when i hit enter it says can't find hard disk check ur set up or press f3 to quit any solution to this prob i'm not to struck on vista my. lappy is an acer aspire 7720Z
The acer's are currently setting up their hard drives as a RAID setup, so you would need to press F6 durring the boot from the CD, enter a floppy with the RAID driver on it, then go on to install. Depending on the BIOS of that lappy, you might be able to change the hard drive setup to some like "IDE", or "Legacy" instead of RAID.
In XP, the sata/raid drivers need to be on a floppy. I'm assuming your laptop does not have a built in floppy drive so you will need to get an external. Please note that I've seen some external floppies not work for this.