The "USB Supplement Driver" is to eliminate the yellow (!) marks on the PCI USB device under Control Panel/System/Device Manager. The USB is a hardware feature on the VIA VPIII Chipset, but Win95 (OSR2) does not include the hardware driver for the device. 1. System requirement: ========================================== Windows 95 OSR2 If your version of Windows is not 4.00.950B, the PC will not accept the USB files and fail to install. No harm will be encountered by the system from trying to install USB support. 2.Installation step: =========================================== a. Remove "PCI Universal Serial Bus" under Control Panel/System /Device Manager/Other device. b. Start Windows Explorer. c. Click on the A: drive to display the contents of the floppy disk. d. Double click on USBSUPP.EXE, following instrucion and reboot your computer to complete installation. e. Check from Windows 95 Control Panel/System/Device Manager. The USB (Universal Serial Bus) becomes a normal device, with the Root Hub added. 3. Uninstall "USB Supplement Driver": =========================================== Once you have installed the USB Supplement, it can be uninstalled from Control Panel, Add/Remove components. If for any reason you wish to reinstall the USB supplement, you must first uninstall any version currently on your system.