How to block a Windows Update from reinstalling in Windows 10

With the best will in the world due to the complexity of the Windows installations and installs of third party software there will be occasions that Microsoft releases a Windows update that breaks something.

A recent security update to Microsoft Office broke a VBscript Word Macro that we use in the business so until we can find a developer that understands it well enough to fix it we need to disable the Windows update. This is not as simple in Windows 10 as security updates are now set to install automatically.

There is a troubleshooter available for download that makes the task very straightforward.

When you click on the download link, you will be prompted to open or save wushowhide.diagcab.

Open or save wushowhide.diagcab

You can save it locally or just open it and run it automatically. The troubleshooter will start, click Next to proceed.
Troubleshoot. Show or hide Windows update

You can choose to either Hide updates or Show hidden updates (useful to then allow installation of the update if the underlying problem is fixed.)
Show or Hide Windows update

Clicking on Hide updates will show all updates that are currently not installed. Tick the boxes of the updates that you wish to block the installation of and then click next.
Hide Windows update

The troubelshooter will then process the request and after a short wait will show that the updates selected have now been blocked.
Troubleshooting has completed

If you decide later that you now wish to unblock the update, simply run the troubleshooter again and then choose the Show hidden updates option. Then select the ones you wish to unblock and click next to proceed.
Show hidden Windows update