I used an app (Memory Booster and/or ES Task Manager) to kill apps running in the background or apps I feel I didn't use so it would free up memory. Anyway, now I cannot access my home screen or profiles. Error message - 'Unfortunately, Home has stopped' and I don't know how to undo what I've done so I thought I would just reset the tablet, but I don't know how to do that either! any help would be appreciated, thanks.