Windows Update Error 80244019 after long time searching for updates

I have not updated my Windows system for over 5 months now (Windows 7, 64bit, SP1). This happened by mistake, not on purpose, because Windows update was set to install updates manually with prompting at 3:00 am.

Today I tried to install the updates. The following happened in sequence:

1. I started updating a set of files totalling to 400 Mb or so, but I had to cancle after 1 minute, because Windows had to restart for a different reason.

2. After restart, I started update manually again, but it hang on "preparing system for installation".

3. Subsequently I ran the Windows update fix tool: https://support.microsoft.com/en-gb/gp/windows-update-issues/en

This lead to a partial fix only. The tool ran unfortunately in German. It says "Windows update error" in the second row and the first two items say "not fixed"

4. I ran the update tool again. Now apparently it was reset, since the earlier runs were not visible anymore. It took a long time (3 hours). Then it stopped with error 80244019. See image. It says in german unknown error 80244019.

5. I am now trying to run fix: https://support.microsoft.com/en-us/kb/3102810 right now, but this fix says "Searching for updates on this computer" and does not show progress so far.

I need you help; do you have any advice?

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