Cannot install Windows Security Update KB2570947

Error code 80072F78 seems to be related to the time and date including Internet Zone. Make sure your computer is right on time zone.

did all of the other updates install correctly?

Never 2nd guess MS on the updates.
Install all critical updates.
Install all important updates.
Install all optional updates (other than the 30+ language updates)

Check the update history. Any other updates which have not eventually been successfully installed?

WimYogya said:

Yes I know.
That is what I found in several support sites.
But it makes no sense: my computer time and time zone have been correct from the start. Never wrong.
So, then what?

How to obtain help and support for this security update

For home users, no-charge support is available by calling 1-866-PCSAFETY in the United States and Canada or by contacting your local Microsoft subsidiary. For more information about how to contact your local Microsoft subsidiary for support issues with security updates, visit the Microsoft International Support website: Please Verify your Location
North American customers can also obtain instant access to unlimited no-charge email support or to unlimited individual chat support by visiting the following Microsoft website: Help and Support

Have you tried to manually install that MS update? That might not solve Error code 80072F78, but at least if it does install

Download Details - Microsoft Download Center - Security Update for Windows 7 (KB2570947)

WimYogya said:

NoN said:

Have you tried to manually install that MS update?

What exactly IS a manual update? I keep retrying to install the failing one, every time failing again.
Any other procedure?

Sorry, i meant using the Microsoft Stand-Alone Installer from the link i provided above...regards to which Os x32bits or x64bits you're working with.

WinYoga,

Let's get one thing out of the way right now which can cause update problems.

I need for you to verify that you have a genuine Win 7.

If MS thinks you r version is not genuine, this can cause all kinds of problems with updates. They so not genuine, then you end up with update problems.
Do me a favor. WIN + Pause/Break | bottom right., you should see a Genuine Microsoft display. Iif not then, have you activated your Windows?
If not, then activate.

WIN is the key with the wavy microsoft flag.

I'n not saying that this is the problem, I just want to make sure that we don't waste your time.