This worked with Windows XP for me. Unzip file to its own folder. Right click on My Computer and select Properties, then Hardware, then Device Manager. Highlight your modem and right click and select Update Driver. Then select "Install From A List....(Advanced)". Check "Include This location in the search" and Browse to find the folder you unzipped this file to. Then click Next. If you get an error message saying the driver didn't pass Win XP logo testing, just continue and allow the driver to install. It works just fine for me. I hope it helps you, too.