"there was an error installing the update" while updating Drive 51

What is the format type on the memory card.

Try the steps here support.garmin.com/.../

FAT32

Thank you, already tried, no result.

What were the results of what SUSSAMB suggested earlier?

I already tried to uninstole Garmin Express and reinstall it, to remove and add device, to start GE as Admin - no results, the error stays same. BTW, other Garmin device updates perfect on the same computer and Garmin Express installation.

One last thing to try as some Windows installations seem to struggle with mtp devices, try setting your DS51 to mass storage mode. Failing that see if the cloning method mentioned here works

www.poi-factory.com/.../39231