I have a question about USB ports - I have a P4 1.60 Ghz computer that had Windows 2000 Pro installed and a scanner attached working fine. For other reasons, I formatted the drive and installed Windows XP Pro on the computer. Everything seemed to be fine until I attempted to connect my same scanner. I get the message: "The unknown USB device is a HI-Speed USB device and will function at a reduced speed when plugged into a non-Hi Speed port. There are no Hi-Speed USB Host controllers installed on this computer." -- The scanner is not working at a reduced speed (not working at all) -- First, why did this same scanner work ok on Windows 2000 Pro and now it is requiring a HI-Speed port -- is this something different because of XP? 2) How do I determine what type of HI speed USB controller I would need to purchase and how expensive are they? -- Thanks for your help!