Q: authorize my computer

Hello there, Charliano.

The following Knowledge Base article provides thorough steps for troubleshooting your issue:

Can't connect to the iTunes Store

http://support.apple.com/kb/ts1368

Specifically if you're on a PC:

Troubleshoot issues in Windows

 

If you haven't been able to connect to the iTunes Store for more than a day (and other customers on our discussion boards aren't experiencing similar issues) a software or Internet service provider (ISP) configuration issue may be blocking your access to the iTunes Store. Find out which ports and servers need to be allowed for iTunes Store access.

• Update iTunes to the latest version.
• If iTunes Store appears empty and only displays the message iTunes Store, follow these steps.
• Try the steps to troubleshoot iTunes Store connectivity in Windows.
• As with all firewalls not manufactured by Apple, you may need to configure Windows Firewall to allow iTunes to access the iTunes Store. Follow these steps for Windows XP, Windows Vista, and Windows 7.
• Try disabling any proxies built-in to Wndows. You should avoid proxies because they can cause issues.
• If you're receiving a specific error message, follow these steps.
• If the issue still persists, contact your Internet service provider and confirm that these ports and servers are enabled over your network.

Note: The hosts file may be blocking the iTunes Store.Microsoft's article How do I reset the hosts file back to the default? has instructions and a FixIt to have Windows try to reset the hosts defaults for you.Note: Some workplaces may put internal resources in the hosts file and may block iTunes Store. The FixIt doesn't work for Windows 8.To create a copy of your hosts file and replace it with an empty hosts file, follow the instructions below:

1. You can find the hosts file at: C:\WINDOWS\SYSTEM32\DRIVERS\ETC.
2. Select the hosts file. There should now be a duplicate of the hosts file named "Copy of hosts" (Windows XP) or "hosts-copy" (Windows Vista, Windows 7, or Windows 8).
3. Drag the original hosts file to your desktop.
4. Right-click the duplicate file and choose Open. You may be prompted to choose the program you want to use to open this file. Double-click Notepad.
5. When Notepad opens, choose Edit > Select All.
6. Choose Edit > Delete.
7. Choose File > Save.
8. Close Notepad.
9. Right-click the duplicate file, and choose Rename.
10. Type "hosts" (without quotation marks) and press Enter.
11. Restart your computer and try connecting to the iTunes Store.

If you still can't connect to the iTunes Store, your security software or firewall may be blocking the ability of iTunes to communicate with the Internet. Learn how to resolve security software issues.

 

Additional Information

If the steps above didn't resolve your issue, be sure that your specific alert isn't listed as a possible iTunes Store error. Then, if your issue is still unresolved, follow these steps.

If you continue to be prompted to authorize your computer, you may want to review this article as well:

iTunes repeatedly prompts to authorize computer to play iTunes Store purchases

http://support.apple.com/kb/ts1389

Cheers,

Pedro.