Hello my name is***** do not rate until we are finished. I look forward to assisting and am very sorry to hear that you are having this problem.
Download and install Garmin express from here: Click Here
Once installed and your Nuvi is connected to the computer it will detect it and show available updates.
This video shows how to do it: Click Here Let me know if you get stuck.
If this did not work, please come back and let me know what happened when you tried it by clicking on reply to expert so we can continue.If it did work, please don’t forget to leave a positive rating - it is greatly appreciated.