Alcatel Tablet 7 Dual Core doesn't boot up. Everything crashes

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http://android.stackexchange.com – My Alcatel tablet 7 dual core doesn't boot up. The last time I was using it is when I was downloading a game from Playstore. It suddenly hanged up so I decided to turn it off. The next thing I know was when I was trying to turn it on again it just displays the android icon and then it just goes on loading for 2 hours! I have tried the power button + volume down combination and selected the reboot option but it didn't work. Tried it again and selected the factory setting option with hopes of getting it function properly this time and failed. I visited the nearest service center in my town but g (HowTos)