Maintenance for the week of March 25:
• [COMPLETE] ESO Store and Account System for maintenance – March 28, 9:00AM EDT (13:00 UTC) - 12:00PM EDT (16:00 UTC)
Since updating through the launcher is not working, the next step you can try is restarting the ESO Launcher followed by running a repair. If the repair gets stuck at 0%, you may need to download a new patch manifest file. Instructions on how to do so can be found below.