The Fix (& It's NOT Your Firewall)
A. Symptoms
When you try to connect to the iTunes Store you may receive the alert message "We could not complete your iTunes Store request. An unknown error occured (-9808). There was an error in the iTunes Store. Please try again later."
B. Resolution
Check your computer's date, time, and time zone. Set the correct date, time, and time zone if needed. If your computer's date, time, and time zone are all correct and you still see this alert message, this issue can be resolved by modifying certain settings in the Internet Options control panel:
1) Go to the Start menu and choose Control Panel.
2) Select Internet Options.
Note: If you are using Windows Vista you may need to select Classic View on the left before you can see Internet Options.
Note: If you are using WIndows 7 you may need to change "View by" to either Large icons or Small icons before you can see Internet Options.
3) Click the Advanced tab.
4) In the Settings box, scroll down to the Security section.
5) Deselect the option to "Check for server certificate revocation (requires restart)."
6) Select the options for "SSL 3.0" and "TLS 1.0."
7) Apply the changes and restart your computer.
Disclaimers
Important: Information about products not manufactured by Apple is provided for information purposes only and does not constitute Apple’s recommendation or endorsement. Please contact the vendor for additional information.
Article source:
http://support.apple.com/kb/TS2753
