I have a nuvi 1490t. It has system version 4.3/4.4. using Win 10 PC. It is in need of an system update. I downloaded Garmin Express successfully. I attached my 1490 and it is recognised. Express has informed that there are 2 updates, a system update to of version 6.3 and a "Proximity Tex, GLX, all Language" update version 3.70. I attempted 3 times to do these updates. When I am prompted to turn off, disconnect and restart the 1490 it goes into a boop loop and displays "loader loading...". I am able to get out of the loop by following prescribed procedures to restart with finger on upper left corner of the screen holding, release after 30 sec, etc. the end result is i have functional GPS with out of date operating system and maps. Do iI need to update to a lower version before 6.3 or is there another issue? What is my next step(s)?