So I am trying to install a cd-rom in my friends computer, its abotu 5 years old, a gateway with a p2. Her cd-rom started messing up abotu a year ago, meaning it would only detect cds somtimes, and now it wont at all. I tried to install a new one, an old 4x, jsut because she does not need anything fabulous. When I first did it, windows simply did not detect the new one, so I restarted with a different cd-rom, that did not work either. After all this I just decided to put the old one back untill I find a better one, but now when I try to put the old one it, the boot up says it can not detect an operationg system, that happens unless I remove the IDE from the motherboard.. I did have the pins on the back right. Any suggestions?