When trying to connect to Itunes it shows an error that my computer has received an invalid response from the device.

Hello ronniecandler,

Thanks for using the Apple Support Communities!

From your question, I understand that you are receiving an alert when connection your iPhone to iTunes. In this situation, I recommend reading over and working through the suggested steps in the following article. There are instructions for troubleshooting on both Mac and Windows in the article.

If iTunes doesn't recognize your iPhone, iPad, or iPod - Apple Support

Cheers!