Internet Properties, click on the Content tab, then Certificates and then follow
the visual aids that I have supplied you for the rest.
Then search for the Intuit certificate and delete it.
After this try your install again. When you see this screen below you will
want to click on the link Publisher: Intuit, Inc.
Follow the visuals that I have supplied for you below.
Hit OK and continue with your update. If this does not work for you
then research any error codes that it is giving you on the Intuit site or call
for support.
Sometimes just resetting the update in QuickBooks update section itself and
re-downloading the whole thing will fix you issue as well.
Remember, as always we are not responsible for any damages you may cause or
incur by anything you do from the help files in this site.
Computer Repair Lakeland, FL