If you want to do Android USB tethering for Windows XP, search if your smartphone has a function for this. Most of the smartphones are coming preinstalled with a function for this tethering. But if your smartphone does not have a function for internet tethering, there is nothing to worry as you can get Tether XP INF download free from here. Most of the free apps for tethering internet have limited capabilities but this tool is really effective and all you have to do is to download and install the folder in your computer once. This is the driver file you need in your computer.