I have a USB1.0 connection on my motherboard that I use for my USB1.0 printer, no problem. I also have a PCI USB 2.0 card that I use for my other devices. no problem. I have just installed a Trust 4 port USB 2.0 hub but it will not work if I connect to USB PCI card. But a USB 1.0 hub will work. If I go to device manager under USB devices i find that the "Generic USB 2.0 hub on USB 2.0 bus" has an exclamation mark by it. I have tried removing it and reinstalling but it is still the same.The driver came with the PCI card. I am using Windows 98 SE.