I cannot apply iOS 8.3.1. It stops responding when I click on agree to user agreements"

Hi there Kelly,

Welcome to Apple Support Communities.

It sounds like you’re running into an issue updating iOS on your iPad. If the issue occurred while trying to update your iPad over-the-air, try the troubleshooting suggestion in this article:

Resolve issues with an over-the-air iOS update - Apple Support

If the issue occurred while trying to update your iPad with iTunes, then try following along with the troubleshooting suggestions in the article linked below.

Resolve iOS update and restore errors in iTunes - Apple Support

Take care,

-Jason