The vendor ceased any support of this product. Fortunately, the OEM of the product, Oct Inc of Taiwan, is still in business. This is the driver version that actually worked for me on Windows XP. The product is a 4 port USB Hub plus PS/2 Mouse/Keyboard Plus Parallel and Serial Port all in one small hub. http://www.octinc.com.tw/products/usb_dock_1.html is the actual product that was sold by Xtend Micro.