I was one of the people who got the update to 7 but I want to go back to a more stable tested version. How can I do it?

I received the update while I was travelling aboard in Asia. Did the update and now have the following problems. 1. After reboot launcher continues to fail. Did 3 factory resets. Somehow stopped after disabling WiFi and bluetooth. Haven't done a shutdown since to avoid launcher3 fail again. 2. Front...