Software update updating gamin nuvi 770
The unit should default back to the previous (internal) map.
Using Garmin Express Using Maps from Other Sources Community Q&A This wiki How teaches you how to update your Garmin Nuvi GPS using a Windows or Mac computer.
But if you were the kind of person who isn’t opposed to that, all you need is some spare time, a computer, a Bittorrent client, a USB mini B cable and, most likely, a small (2 to 8GB) SD card. And I don’t have a windshield mount for my phone, either.
So I’ll keep using the Garmin for the foreseeable future.
In modern version of Windows, you can disable this from starting by opening Task Manager (CTRL SHIFT ESC), clicking the Startup tab, and right-clicking on “Garmin Express Tray” and choosing “Disable”.
UPDATE (09/07/2016): Thanks to reader Joe, who pointed out that Garmin has retired their web browser plug-ins and has a new app you can use to update your unit: Garmin Express.
So if you want to update your Garmin’s OS before updating the map, click the link, download and install Garmin Express, connect the GPS to your computer via USB and start Express. 🙂 UPDATE (02/24/2017): I just wanted to mention that the Garmin Express app comes with an auto-start feature.
For older versions of Windows, click Start Run then type MSCONFIG and press ENTER.
If there is a software update, go ahead and install it.
Next, delete the file on your GPS, rename the downloaded file to gmapprom.img, and copy it to the same folder on your GPS.