Hi. Try removing the memory card first, then restore the GPS to factory settings, without the memory card inside try to update the operating system only, oʻnce that is done, format the memory card, put it back in the GPS and install the maps. Unfortunately it will keep doing this every time you do an update. Now I got mine working after having it blocked a second time, I bought a newer version and I only keep this one as a backup for the following 3 to 5 years.
