Maybe the best thing is for me to say what I've done so far so you guys can tell me what I'm doing wrong. I've changed the floppy cable and checked the pins and my connections. Also put in a different, tho not new floppy. In CMOS I've got Floppy seek enabled, floppy swap disabled, boot sequence A,C and Onboard FDD enabled. Tom, I was very tempted to load Bios default and load Setup default but dared not. Also checked the twist in the cable like you said. Carroll, I'm taking your advice not to swap harddrives (sounds scary anyway) Anyway when I start the computer, I can hear and see the floppy spinning. The light came on for 3-4 seconds, then goes out (Previously it was on all the time). There is no longer the message "Floppy disk(s) fail (40 )". When I try to boot with a floppy I get the message "Disk boot failure, insert system disk and press Enter". I know the floppy disk is good coz I can boot up another computer. I don't know what else to do. Cathy The NOSPIN Group is now offering Free PC Tech support at our newest website: http://freepctech.com