How do i fix "an unknown error" 1618?

I've got exactly the same issue, was doing the update today and the iphone came up with a message saying update did not happen, next thing it wants to do a restore but cannot and keeps coming up with error 1618.

I have tried on another laptop with itunes and it's the same problem.

So at the moment I have an iPhone 4 that will not switch on either with a Hard Reset or Soft one!

Any ideas anyone?

Could be anti virus software and the firewall preventing the restore process.

iTunes for Windows: Troubleshooting security software issues

Thanks for the tip, have managed to get it to restore on another pc, without any virus protection. Only problem I now have is that the pc is not recognising the iPhone and it's stuck on 'Emergency Calls Only'. Have tried the Hard Reset many times with it plugged in but it doesn't see the phone in itunes.

Any help is much appreciated.

On Windows 7 or Vista, disable UAC in start>control panel>user accounts. restart PC. device disconnected, turn completely off. perform this procedure: open itunes. simultaniously connect cable and hold home button until itunes message "detected device in recovery mode" . acknowledge message, click restore.

First of all sorry for the bad english. When i'm trying to update my iphone to 4.3.5 i always get the error 1618. When i'm trying to get my old firmware back it says 3194. I just want to update to 4.3.5 en use my iphone again.I tried it on Three other pcs . And virusscans and firewalls aro set off. What else can i do? Please help me.

Grtz

Same problem here, iPod Touch 4 wasn't syncing so I tried to restore and now stuck on apple logo and loading bar then error 1618.. Please help! If you had the same issue please don't be selfish and give the answer!

how would you do that then please help im getting error 1618 i dont have acsecc to another computer hhhhhhhhhhhhhheeeeeeeeeeeeeelllllllllllllllllppppppppp!!!!!!!!!!!!!!!!!!