I had issues in the past with the RSS Feeds in Outlook especially in the latest version (2013 as of this writing) and sometimes I'll remove the RSS support from Outlook. To disable RSS, open the registry editor and add the following or create a text file ending in “.reg” and the double-click to import:
Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Options\RSS] "Disable"=dword:00000001