I need step by step instructions on how to set up, configure my new dell notebook with ATT wireless high speed internet. Please help.

Do you have a router and what kind??

Here's a step by step guide (http://www.microsoft.com/athome/moredone/wirelesssetup.mspx) for wireless setup.

Another great guide is Wireless Network Setups (http://www.wirelessnetworksetups.com). It has lots of information on setting up wireless networks and also has information on how to pick the best wireless router (http://www.wirelessnetworksetups.com/best-wireless-router.html) suitable for your needs.