I thought you said you had Intel USB 2.0 Drivers, because you asked if you should uninstall them when you first asked about NUSB? If your Intel USB2 driver package works like the one I have, when you run the "installer" it doesn't really install anything. All it does is extract itself to C:\WINDOWS\DRIVERS\. This is, shall we say, less than helpful. If it extracted itself to C:\WINDOWS\INF\, it would be useful, but I digress. Go into your Device Manager and see if your USB2 hubs are properly recognized. If they show up as unknown devices, remove them, and reboot. When asked for the location of the driver, point the installer to C:\WINDOWS\DRIVERS\ or wherever your package has extracted itself. Now I know that I was failed. I never knew why was an unknown PCI USB controller device in the Device Manager list, altough there were normally listed the Intel USB controllers and hubs.Because the hardware is USB2.0 capable, I thought that the driver is too. I installed the R.Low driver and I detected the slow speed with a pen drive. Then I realised that the driver is only for USB1.1. Today I began to search for a USB2.0 (orange) driver and then installed it. Then the USB2 controller device is uppaered in the Dev. Man. list and the unknonwn device is disappeared. But the transfer speed does not changed. I thought that the R. Low driver connected itself with the USB1.1 driver because when it was installed, there was not USB2.0 controller driver. I do not know how to uninsta it, so I decided to uninstall the Win98SE then install again with the hardware drivers first (with the orange driver) and then the R. Low driver. Now is everithing is ok. The pendrive is identified as USB2.0 Mas Storage Device and the trasfer speed is sinificantly improved. Ps. Now I read the readme of Intel. So you are right. I should delete the Unknown PCI to USB Host Controller. I was missed because I run the setup. Maybe Intel has USB2.0 driver for Win98SE?