I Synced my phone when I had the previous version of iTunes (before the Sep 10 IOS 7 and IPhone 5S / 5C Launch), but the newer version wasnt working. After reinstallation, I reinstalled all the softwares and iTunes, which then asked me for an upgrade and I upgraded to vesion 11.0.4.4 and when I got done with everything and plugged in my phone and it didnt read my phone and gave the error I mentioned before. After installing Kaspersky internet security and scanning my laptop, I removed the virus but still reinstalled windows and removed all my content from the laptop (the docs that mattered) and formatted it. My laptop had a virus because I didnt have any antivirus installed since I thought windows 8's built in Windows Defender was an antivirus (and well enough at that, but I was mistaken). I'm using an Iphone 4 Factory Unlocked with IOS 6.1.3 (no system change) and iTunes 11.0.4.4 (after the upgrade). Thank God its working now! As for the answer to your question, read the first para, for attempted solutions, read second one, for the one that worked, read the third one.

Try to restore from another known-good computer and network.

You may need to restart your computer and modem to get online.

Connect your computer directly to your Internet source, bypassing any routers, hubs, or switches.

Or, follow this article by Microsoft: How to reset Internet Protocol (TCP/IP) to reset the packet size back to the default for Windows. Contact the manufacturer of the software that installed the packet-size modification for assistance. Your default packet size being set incorrectly can cause this error.

There may be third-party software installed that modifies your default packet size in Windows by inserting one or more TcpWindowSize entries into your registry.

Eliminate third-party security software conflicts.

Try a different USB 30-pin dock-connector cable.

Put a USB 2.0 hub between the device and the computer.

See the advanced steps below for USB troubleshooting.

Perform USB isolation troubleshooting, including trying a different USB port directly on the computer.

These errors are typically resolved by performing one or more of the steps listed below: This may be resolved by following the steps for errors 13 or 14 above. This error occurs when there are problems communicating through USB.

ITunes cannot connect to the iPhone because an invalid response received from the device

Invalid response received