I recently jailbroke my iphone 4 and i want to restore it but i can't?

I don't want the jailbreak anymore and i'm pretty sure the only way to get rid of it is to restore it. However when i go into iTunes and try to get restore it i get an error 9006 i've looked it up on the internet and they say to disable antivirus i've disabled it all and triple checked it and nothing works please help. Ps. I don't know what category this should go in

Your best bet is either calling Apple or going to the Genius Bar (Apple store)