My 75 year old father bought a computer when XP first came out. He got to be well versed with it. Well, this past March he decided he wanted a new system with Vista. Big mistake on his part! What I have attempted to do is make his HP m7750n into a dual boot system. Here is what I have done so far, and where I stand at present. I purchased a WD 250Gb, SATA300 hard drive. (I didn't want to attempt both on the same drive). I installed the hd and at first Vista(in explorer) did not recognize it. However the device manager did. Anyways finally got explorer to see the drive. I pop in XP Pro and a message comes up stating something to the effect that the operating system on the system is newer than XP so I cant' do what i wanted to do. I tried to cancel the message etc but no luck. So, I unplug the hd with Vista on it. Pop in XP Pro, and it starts the install. Everything is fine till the actual XP window comes up with the little scrolling lights, and it stays there. It scrolls awhile, stops and scrolls again. Never actually starting XP. I did notice that the light that shows hd activity almost stops completely at this point. Needless to say, XP is still not installed. Spoke to a couple guys at Best Buy. One told me I can't do what I'm trying to do. The other told me to format Vista off the first hd, install XP on the second and then re-install Vista on the first. Sorta lost and in need of assistance. tia