Failed Update

I need some help for my tablet.. I have a china made tablet with its processor and other components of samsung made.. I forgot my password which i set for which i am unable to use my tablet. I tried to hard reset my tablet but when i press the volume down key and power key an error message id...

I'm having issues installing the current batch of Windows updates on my Surface Pro II. It gets to 75% complete, hangs for 1/2 hr or so, reboots, then fails with a ":( Your PC ran into a problem and needs to restart screen etc (Driver_power_state_failure)" Following the restart it gets to 75%...

i have Blackberry Curve 9320 .. the current version i have of twitter is 3.0.0.24 and when an update came up it was 4.4.0.11 i tried to download it and it was slow on wi-fi and on mobile network and in the end it says failed to upgrade .. i waited for another update to come up so it might fix...