I can't turn my device off without the unlock pattern

[bklindahl]

In order to factory reset my tablet I need to turn it off.I can't turn it off without the unlock pattern which I don't know, I don't even know how that got on my tablet.

 

[bignastyid]

http/www.tomsguide.com/forum/id-2317968/read-passwords-lock-codes-pin-numbers.html