Got on the Garmin page to update the maps of a lifetime maps unit. The web site said I needed to update the firmware and that it could only be done by a technician talking with me over the phone.The technician I could barely understand remoted into my computer without my permission did something in command prompt, and then claimed I had multiple "chinese viruses" and a trojan horse. He said he couldn't go any further until he sold me McAfee software for 200 dollars. He couldn't tell me how this software was different than what I could get online for less than sixty dollars. I told him I had been running Avast and had not seen this issue.I said I'd install a paid version of Avast or McAfee and call them back. After we hung up, I couldn't do anything on my computer and the speed was slowed to a snails pace before it locked up. When I restarted the computer, the system rand a checkdisk for some reason...putting me thirty minutes more behind schedule. After this was complete, it seemed as though my computer was completely rearranged.Desktop icons were in complete disarray. There is something shady about this.User's recommendation: Consider other brands of GPS.