The top 3 fixes to itunes error 9808 seem to be
1) Go to Start > Control Panel > Internet Options > Advanced, make sure that SSL 3.0 is checked and TLS 1.0 is checked. Also under Security make sure that the “Check for server certificate revocation (requires restart)” is unchecked. Then click ok and fire up iTunes.
2) The culprit was Norton. The users are set up as Admin and Standard. I have Parental Controls turned on in both Vista as well as Norton. Admin users had no problems connecting to iTunes. Standard users would get the error. I had to go to Norton’s Personal Firewall and add the program “iTunes Helper.exe” and set the option to “Allowed” (”iTunes.exe should already be in the Allowed category.) in order for the standard users to be able to connect.
3) close iTunes if you have it open right now. Then go to C:/Documents and Settings/username/Local Settings/Application Data/Apple Computer/iTunes. Delete or cut the preferences.xml file which contains your iTunes preferences. Then go to C:/Documents and Settings/username/Application Data/Apple Computer/iTunes and delete or move the preferences.xml file. For Mac users, there is only one file you must delete or move a to a new location and is located at User > Library > Preferences > com.apple.itunes.plist. Restart iTunes and it will recreate those two (or one) files with the default settings. Feel free to set your preferences back to what they were and then connect to the iTunes store and enjoy!
You already tried #3 - maybe #1 or #2 will do it for you.
