Hello, yes the patch was successful but RSLinx still wouldn't load it. Yes, I am using a real COM port. In my frustration, I just reformatted the hard drive and installed Windows XP with SP2. Fortunately, I got some startup disks that came with one of my Dells and it loads up to any Dell - so far (I don't know how it gets is product id). And thank you for that website, I will get a 1747-UIC later next year. Much appreciation for your time and information.