There might be lots of Garmin gps update issues but the curing method is greater than that. Have a look at some actions that will solve your map update issues:
1- Make sure you install the latest version of Garmin
2- Check the compatibility of both the software and operating system
3- You need to install the latest .Net Framework
4- You have to install latest Windows update
Excel in the above steps to solve your update issue. If anyhow you backed out to apply the above steps, then make a ring on our toll-free number 1-844-776-4699 and share your problem to technical team of expert. Service available 24*7.