One of the guys at work asked me to look at a Compaq Presario 575 of his, and see if there were any low=cost upgrades that would make sense for it. It's only got a Quantum HDD of less than a gig, running Win95. I want to at least put a bigger HDD in (got a lot of them laying around). But no matter what combo of jumper positions I try, I keep getting a Disk Controller Failure with the new drives. The original Quantum has only 3 pins where the jumpers would normally go, instead of the typical double row of 5. Is it possible that this PC is so old that "modern" drives won't work with it? And I can't find the right key to press during bootup to get into the BIOS, to see if I can get it to boot from a CD.