Hi,
Are you trying to update this patch from Microsoft site or downloading manually and then installing! I would recommend you to download this update from Microsoft site:
http://www.microsoft.com/downloads/details.aspx?familyid=35c1d5a9-a953-4fc6-90c0-d2358c7b89e6&displaylang=enand then run and see if you face any error.
Regards,
Faraz H. Khan