Hi, just purchased a Galaxy s3 and after initial setup and dowloading a couple of apps i decided to run the software update option from the settings menu. got it upgraded to ver 4.0.4 and afterwards the phone is ramdomly opening the security and lock screen settings regardless of what i'm doing with the phone. tried restarting the phone, took the battery out but problem persists. any help will be greatly appreciated. i'm new to android.