unable to open the tablet disk on pc

[AC Question]

Tablet is connected to my pc. then, "turn on usb" for showing on my tablet. but, my tab pattern is forgot. So, unable to touch the that option..
plz help to unlock the my tab ... no volume button

 

[B. Diddy]

Welcome to Android Central! Which tablet? Have you not used this tablet for a while, or did you just change your password and then promptly forgot it?