I have 2 dell pcs on one I get error loading operating system. I can take the same hard drive out and put it in my other pc and it will boot up perfectly. I have changed out the cbale to the hard drive so I know that is not the problem........any ideas? thanxxx

It could be the controller on the motherboard or the mobo itself. Looks like you're going to have to call Dell........have fun..........

Dude, all PCs are NOT the same! Even 2 Dells cannot use the same HD to boot. Unless they are EXACTLY the same model with identical motherboards. What exactly did you mean by: "I have 2 dell pcs on one" Post back Rich Gu

Have you changed anything in system or hardware configuration? Also, once I had an loading operating system error when my RAM was burned out.

Richgu - punctuation might've made things clearer: "I have 2 dell pcs. On one, I get error loading operating system." Perhaps the machines are identical models - all things being equal, then (as suggested) it would appear to be a hardware issue on the 'problem' machine Diplomacy is the art of saying 'Nice doggie!'... till you can find a rock

the machines are identical...sorry for any confusion.......on one machine when I boot it up I get the error message, error loading operating system..........however if I take the hard drive out of that machine and place it in the second one(that works properly) it boots up with no problem at all. If I take the hard drive from the system that boots properly and place it in the one that got the error message, I get the same error again.........does that make sense? LOL....

Tends to indicate some kind of hardware or bios setting problem. Try reseating ram and check/compare bios settings. Reseat the IDE cable or swap the cables as well as the drives. I used to have a signature but it disappeared and I just couldn't be bothered writing another so please feel free to ingore this.