2. Run Garmin Updater by *.rgn and put point on 'USB Device:' ( see picture on [Only registered and activated users can see links. ] ).
3. Click and hold the upper left corner of the screen and connect nuvi with PC.
4. After 2-4 seconds when the PC recognizes the device ( you will hear a specific sound in the bar ' USB Device:' will appear the information ) you have to quickly click 'OK'.
5. After the appearance on the nuvi screen 'Loading .....' you can remove your finger from the upper left corner of the screen.
If during flashing the device will disconnect from the PC repeat the procedure again but only in step 5 do not remove your finger from the upper left corner of the screen till the flashing end.
I recommend using the USB socket on the PC motherboard and without the extension cable.