This is a facebook app so you need to create a facebook account:-
1. Go to the link https://www.facebook.com/COMPUTERBILD/app_111249102378691
2. Click on the like button on the top.
3. Follow the picture:-
Follow the second picture:-
5. Now you will get a facebook page and a share box will open. Just close the share box or click share, ie the blue button. Please note that only this box will appear in german.
6. Lastly you will find your key. The step 3-5 needs to be repeated every 3 months to get a new key.
7. You can use Norton CBE edtion upto november 2nd. Also note that after November 2 Computer Bild may give us a new a version of Norton or soem other internet security software so dont worry.
8. You can download the installer from here:- http://www.computerbild.de/go/nortondownload
9. In the box provided enter the code you received from facebook and click OK, and your download link will be ready.
10. Now we will get the full license key by following this link http://www.computerbild.de/norton-internet-security-cbe-aktivieren-und-verwalten-7784081.html
11. After that, use your facebook to login, click login with facebook button.
12. Now in the box which asks for the code enter the same code you got from facebook. After you submit it your license key will be displayed.
Enjoy.
source
1. Go to the link https://www.facebook.com/COMPUTERBILD/app_111249102378691
2. Click on the like button on the top.

3. Follow the picture:-
Follow the second picture:-

5. Now you will get a facebook page and a share box will open. Just close the share box or click share, ie the blue button. Please note that only this box will appear in german.
6. Lastly you will find your key. The step 3-5 needs to be repeated every 3 months to get a new key.
7. You can use Norton CBE edtion upto november 2nd. Also note that after November 2 Computer Bild may give us a new a version of Norton or soem other internet security software so dont worry.
8. You can download the installer from here:- http://www.computerbild.de/go/nortondownload
9. In the box provided enter the code you received from facebook and click OK, and your download link will be ready.
10. Now we will get the full license key by following this link http://www.computerbild.de/norton-internet-security-cbe-aktivieren-und-verwalten-7784081.html
11. After that, use your facebook to login, click login with facebook button.
12. Now in the box which asks for the code enter the same code you got from facebook. After you submit it your license key will be displayed.
Enjoy.
source