I have a new Sony laptop with XP Pro SP2 and two USB2.0 ports. I just put together an external hard disk using a Bytecc USB2.0 box and a Maxtor OEM 120GB disk. When I connect it, I get that stupid "This device can perform faster...." popup from the system tray. I don't get any complaints when I connect my USB2.0 thumb drive or a USB2.0 Ethernet adapter and they're nice and fast. I don't have another machine here with USB2.0 ports to test the drive against. I've unplugged and repluged a million times and even deleted all my USB controllers/root hubs/mass storage devices from device manager. I've test copied some big files to the disk and its definitely USB1.1 speeds. God I hate USB.