I just joined today and I hope I am posting my problem to the correct area, if not, I apologize. have a TomtomOne 130S and it is a couple of years old. I restored my AcerPower FE Desktop to the way it was when it was new on 7/24/10, because of scareware. Before the restoration, I never had a problem updating the maps on my Tomtom GPS unit. Since the restoration, when I download TomTom it does not download to my desktop but it downloads to a download folder. I have sent it to my desktop and then double click to install, but nothing happens. I get the message that Firefox doesn't know how to open this address because the protocol (tomtomhome) isn't associated with any program. Can anyone help me please? I need easy to follow instructions as I am not tech savy. I have Windows XP and Firefox and 90 days of free Norton. I am wondering if because my GPS unit is a few years old if TomTom will no longer allow me to download TomTom to my desktop. If anyone can help, I would greatly appreciate it. I do not have a problem downloading anything other than TomTom.