I have a Compaq Presario 4784. The hard drive got fried. It was a 4.3gig. The computer has 80 megs of ram and a 200mgtz processor. I was thinking about upgrading the Hard Drive to a 40 gig 7200 rpm EIDE Western Digital. It has Ultra ATA/100 and Ultra ATA/66 interfaces. Will this hard drive work ok on this older model Compaq? Let me know. Thanks!