You are in for years of pain, I have given up after installing, uninstalling both Garmin Center and USB Drivers, editing the registry (you need to do this or it will remember your settings), having discussions with helpful support people from Garmin, updating the firmware on my 305 and crying/swearing a lot.
So now it works fine on my work computer and our netbook but not on my regular NEC Laptop. Although it did one day work but the not the next and now I just don't even try
Mine joined that club a month or two ago too. Can't fix it either - and I have nowhere near Ruchard's computer skills.
Oh yeah, the GPS is accurate
, the moon is made of cheese, Elvis is alive and well and living in Girrawheen and fairies live at the bottom of your garden.
I'll try and install it on the work computer and see how that goes.