If updates are failing, a factory reset may be necessary before attempting to reinstall software: Navigate to > Backup and Reset . Select Restore Factory Settings > Reset Device > Clear All .
If your device won't boot, you may need to "flash" the firmware via a USB drive. evpad 5s firmware install download
If the system is sluggish, perform a factory reset via Settings > Backup and Reset > Restore Factory Settings before attempting a firmware flash. If updates are failing, a factory reset may