Iphone 5 9.3.5 update error help!

I updated my phone earlier and now it's stuck on the apple logo screen with about 60% of the bar, and on my computer screen it reads: The iPhone could not be restored. An unknown error occurred (-1). I've searched up the error code and tried to fix it that way but it hasn't worked. I'm not sure what to do, I can't restore/update it someone please help!