Which Anti Virus or Security suite are you using to scan downloaded file. Shut it
off from scanning or better still uninstall it and then install the Update and then
re-install the AV
It will install manually from the MS download site. In Windows Update,
click on the "more information" link and it will take you to a knowledge
base page with a download link. I had to use that method to install the
last 4 updates from this month.