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The lock code protects the contents of your tablet from unauthorised use. When the lock code is turned on, it needs to be keyed in every time you turn on your tablet and when it has been in sleep mode.
Find "Screen lock"
Create lock code using a pattern, go to 2a.
Create lock code using a PIN, go to 2b.
2a - Create lock code using a pattern
Repeat the selected lock code to confirm.