|What model emachine? Beep codes vary.|
You need to make sure this memory you're putting in is compatible with the motherboard. You removed one stick and it started up. Are all your ram sticks marked the same? Maybe the removed one was bad or not completely installed or the socket was dirty.
Hard drives moved from one computer to another rarely boot to windows because the installation is configured to the first one. So, when you removed the stick of memory and it started up, what happened next?
Edit I guess I echoed what Riider said. I brought in some groceries before confirming. I guess I should have refreshed.
message edited by DAVEINCAPS