Actually, there are drivers compatible with Windows XP and Vista, but the only package available on the official website leads to a broken URL. You will need SAM4sEllixWindowsDriverV19_6.zip. Google doesn't offer any help at all because no websites list this driver as being available. In this case, I recommend using an application from the database of Software Informer. Download one of the driver detection applications and perform a check for the drivers while the device is connected to the PC. This is the only way when there is absolutely no possible way to download the official driver.