hope this will help u
Make sure that your computer is connected to Internet.
Start Norton 360.
At the right bottom corner of the Norton program window, click
Type the 25-alpha numeric product key, and then click
The product key can be found on a yellow sticker on the back of the CD
envelope or in the confirmation email of your download purchase.
If your product came with your computer you may not have to enter the
product key. You can skip this step.
In the Norton Account Window, enter your email address and click
Your Norton 360 checks the existing Norton Accounts using the email
Do one of the following depending on your situation:
If Norton 360 finds your Norton Account, enter the password and click
If Norton 360 does not find any existing Norton Account, complete the
form and click NEXT.
Review your subscription details, and then click DONE
Your copy of Norton 360 is now activated.