I have a Compaq Presario C304nr that came with XP Home on it, along with a bunch of other stuff. I would like to put XP Pro in it. My question is; there are two partitions on the hard drive. C which does the normal functions, and D, which is a recovery program. Should I delete the recovery drive, then format the c drive? Also one of my friends tried this on his Compaq and when he went to install Pro he got a message that there was no hard drive recognized. What is that all about? and how do you make the hard drive recognisible?