Haha sorry, my attention was focused elsewhere while writing. I'm not two knowledgeable about this newer(refurbished) pc. Last time I opened it, I noticed that there was only room for one connector for the hdd, and the case couldn't fit another one. I'd at least try cloning my current hdd with windows 7 on it, but my external isn't very reliable and I haven't been able to return it yet. I figured there might be an easy way to take out the current one and use the old one. I had a thought that I could try changing to the windows vista hdd and if I came across an error (which I think would likely happen) I could use a cd or something similar to repair the system and boot up my old hdd with no problems, and then when I wanted to switch again, I could try the same process. Was just an idea though.