BB Curve :: Restarted Phone But It Wouldn't Turn On

i decided to backup my phone as i had not in a while.It was perfectly fine when backing up and when i downloaded my pictures.A notification came up that my software was not up to date so i pressed check for updates.My computer found one update and i proceeded to update it.After the update my phone appeared to be completely wiped.I wasn't worried because i had done a backup.I proceeded to restore my phone.at one point it became frozen at a certain point.the cord became unplugged accidental and i gave up for the night.i plugged it into the wall to charge it and went to sleep. when i woke up the screen was completely white and it said "app reset". i restarted my phone but it wouldn't turn on.once it did it took about 20 minutes just to fill up the restart bar. after that it took about 5 minutes before it proceeded to security software verification but wouldn't load.the small black black arrow will not leave the screen of my phone.the software security wont update and i am getting very frustrated.at the moment the software security is still going and is only at 8 percent after this it doesn't proceed any farther but simply turns white and says app reset. i have now been through this process twice and just have my battery, sim and micro SD chip out and my phone is sitting next to me.