Error 13 and 14: These errors are typically resolved by performing one of more of the steps listed below:

1. Perform USB isolation troubleshooting, including a different USB port directly on the computer.
2. Put a USB 2.0 hub between the device and the computer.
3. Try a different USB 30-pin dock connector cable.
4. Eliminate third-party security software conflicts by following iTunes for Windows: Troubleshooting security software.
5. There may be third-party software installed that modifies your default packet size in Windows by inserting a TcpWindowSize entry into your Registry. If your default packet size is set incorrectly it can cause this error. Contact the manufacturer of the software that installed the packet size modification for assistance.
6. Connect your computer directly to your Internet source, bypassing any routers, hubs, or switches. You may need to restart your computer and modem to get online.
7. Try to restore from another known-good computer and network.

If you find an ASR error 1000 in the iPhone, iPad, or iPod updater log file, that is an error decompressing and transferring the IPSW file that is downloaded during the restore. This error is frequently caused by third-party security software interference, a poor quality Internet connection resulting in a bad IPSW download, or a conflict on the USB bus.

source: http://support.apple.com/kb/ts1275 (click at Specific error codes and resolutions)

last few week i also cannot restore and got error 29. bring to maxis n they give new set. lucky still got 2 more month waranty.

This post has been edited by amad_maui: Jun 25 2010, 12:24 PM

shouldn't be any problem with iTunes 9.1. just download the 3.1.3 firmware. you can get the firmware link from this thread - http://forum.lowyat.net/topic/868281

and after finish downloading open itune and hold shift and click restore (for Windows users) and select the firmware.

This post has been edited by amad_maui: Jun 25 2010, 02:25 PM

ermm... not sure about the sign. i just did a restore few days back but then iOS4 not yet release at that time.
anyone else can confirm?