Microsoft has pulled the update which caused problems for many users of Outlook 2013 from Windows Update.
The update description page ("Description of the Office 2013 update: September 10, 2013") does not mention the withdrawal of the update. The revision number for the document is still 1.0 and the links to the standalone installers for the update are still present. The files are still available for download.
Reports that a hotfix is available for this problem appear not to be accurate. The hotfix, described here, was released several weeks ago and addresses different problems.