IPhone won't restore and stuck in recovery mode?

My iPhone is stuck in recovery mode! When I plug it in it says "iTunes has discovered an iPhone in recovery mode and it needs to be restored to continue" and then I click restore. But then it says "preparing iPhone for restore" and then it stops and says that it doesn't work. I have tried restarting the computer with it plugged in but it didn't work either and I have tried restoring it 4 times

Added (1). Hard reset doesn't work and there's also an issue with the screen being extremely dim that even when you manage to see it you hardly can.

Do a hard reset.

This happens all the time when I restore my iPod and Phone! It's always fixed by using a different iTunes account. As in, getting on a different computer and restoring it there. I don't know why it wants a different comp but it always works. Try someone else's and set up as a new device. It's the best you can do unless you know how to copy a backup from one computer to another, which I don't know how to do.
If this doesn't work you'll probably have to contact apple.
side note: youtube search the problem and see if there's a tut on it. There's tuts for most things these days.