Windows 8.1 update fails.

Since the last "Patch Tuesday" on June 9, none of the important and other available updates will install. This is my last attempt to find a solution to the issue. I tried everything: troubleshooting, chat with MS Support for two(!) hours, googling all sorts of forums. All tis with no results. Remarkably, even MS chat from Answer Desk was unable to help. I cannot believe it that there is no help/support from MS available. That, if it is true, is very sad to say the least. I am sure that there is somebody at MS who could help/support to get the issue resolved but where is he or she??? I have been working on the issue at least 3 hours a day since June 9!!

The PC runs perfectly on the other hand. The errors that appear when looking into the details in the update history are the following ones:

1. 800F0922
2. 80071A91

both appear always,

3. 80246010
4. 80240054

both appear only a couple of times but the 2 above.

There is NO clear explanation for these errors or where the source may lie. This is in a way ridiculous. Why show them when no solution is offered at all?

Is there anyone at MS who can help??? If not, I am forced to reinstall Windows 8 from the purchased DVD and go then through the whole reinstallation and update process.