Ok so if you entered here you are have trouble setting up your master account i figured out how to reset your whole system like you just got it that day *warning this will delete everything*...but it worked for me and I hope it will work for you. ok here are the steps.
1.Go to Settings
2.Go down to System Settings (click on it)
3.Go all the way down and click on Restore PS3 System then click yes
Reseting your whole system will take a while depending on what you have in the memory
4.When its done set your your master account right this time around
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