@Daniel Grabowski
Hi,
The error code 80072efe indicates: The connection with the server was terminated abnormally.
Please Make sure there are no firewall rules or proxy to block Microsoft download URLs.
You could try the following:
Click on Start, and then click Run.
Type cmd in the Open box to get a DOS prompt.
Type "net stop wuauserv" without the quotes at the command prompt, and press Enter.
Delete (or put in recycle bin) the contents of C:\WINDOWS\SoftwareDistribution (but not the SoftwareDistribution folder)
Type net start wuauserv at the command prompt, and press Enter.
Now try Windows Update again.
Also, you can manually download the following update to see if it solves the problem:
Download KB3138612 https://www.catalog.update.microsoft.com/Search.aspx?q=KB3138612
Hope above information can help you.
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