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Posted 27 Jun 2015
Licenced CPOL

Small Tip to Solve an "Unknown error" 0x80070663 during Windows Update

, 27 Jun 2015
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If you are getting the unknown error while trying to update your Windows, try this before going mad.


After 5 weeks of having to wait for my computer to stop because it was installing some pending updates, and failing each time (0x80070663)... and of trying to update it going to Windows update, and trying to update it by downloading the KB files directly, I came to CodeProject and made the question and in less than one hour phil.o gave me an answer that solved my issues.

Here, I'm posting that answer in order to make it easier for me to find it again and of course to help anyone with the same issue,

How To Solve It

Before you start modifying the register and getting mad, it's worth trying to use the simple Microsoft fix it that solves the Windows Update problem which can be found here:



In my case, executing the Fix It assistant made it, and as it was a Windows Update issue, I selected "the program doesn't appear on the list".


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Joan M
Chief Technology Officer robotecnik
Spain Spain
I'm from Catalonia (in Spain) and a specialist in CNC, PLC, robotics and automation in general.

From 1998 I've been developing software applications for the automation market.

I'm using different technologies in each case to get the proper result, fieldbus communications, special electronics, special laser sensors, artificial vision, robot arms, CNC applications, PLC's...[^] - robots, CNC and PLC programming

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