The manufacturer's website is easy to navigate. I suggest getting any or all drivers from them directly. This is a self extracting file so here is what I did. On WinXP, using the serial cable that was included, I ran the file and choose to cancel the installation after it extracted. Then went through device manager and updated the yellow question mark which was the UPS. It extacts to the C drive in ppp_setup folder. I redirected the computer to look there and it installed the drivers. It also asked if I would like to install Power Panel Plus so I said yes. Thats it. For step by step instructions go to the manufacturer's Website.