I've tried to restore my iphone multiple times and the white bar won't go across

Including last night, I've been sitting at my computer for at least 6 to 7 hours...

Saturday morning, I woke up to a strange icon on my phone when i turned it on. It said i needed to connect my iphone to itunes. I just got my iphone a few weeks ago, and i didn't have any problems up in till now. So I causually went up to my computer, and plugged my charger into the computer, and plugged my charger to the iphone. A message popped up saying my iphone needed to be restored. So I clicked 'restore and upgrade." It was restoring for 2 hours. When it was finally complete, a small white bar apperead. Unfortuantly, even though my phone was plugged in for several hours, it still made no progess. I updated Itunes..I even updated my computer! I tried another computer which has more updated feautures to it, and it still has the same problem. Any suggestions? Greatly appreciated.