You must choose "other". But before you do this, you will need to make a Disk Tools diskette from the image provided on the Power Macintosh 4400 CD. After making the Disk Tools diskette, choose "other" from the list provided by Norton. You will then be prompted to insert the Disk Tools diskette for this CPU. Norton will use this disk to build an emergency floppy disk tailored for the Power Macintosh 4400.