I already have a different SATA drive in there and remember these same problems with that one as well but just don't remember how I fixed it. I went into the first SATA drive and in Windows I formatted the new disk and I can use it fine as a 2nd disk but I want to clear this one and use the new one as its bigger and newer. And if the new one works or not, I cannot see either drive when I go to install WinXP.