Hi I did a system restore on my Dell Dimension because I had a virus and I thought I had the right disks to reload everything, but when I get to the black screen that says put in the Windows Configure Disk, I put in what I assume is a Windows XP Operating CD that came with the computer and I press "r" like it says but it just keeps going back to that black screen and repeating it, am I doing something wrong or is there another disk I am supposed to use, thank you for your time