For more information about how to turn on automatic updating, see Get security updates automatically. When you turn on automatic updating, this update will be downloaded and installed automatically. This update is available through Windows Update.
There's no way I can find to manually install KB 3074663, either. I'm still looking, and I can't find KB 3074663 anywhere, except at the bottom of the "View your update history" list. When Windows 10 came back up for air, KB 3074663 was nowhere to be found - it didn't appear after clicking on Check for updates, and when I went into Uninstall updates, it wasn't there either.
I started by removing the oldest security patch on my system, KB 3074663. Once you've removed and hidden the patch or driver, reboot your system, and it shouldn't darken your doorstep again in the future - that's the theory.
Second - before you reboot - you need to run wushowhide.diagcab and follow the old-fashioned Troubleshooter (Windows 7 veterans will remember it well) to find and check the box next to the driver or patch you just uninstalled, in order to "hide" it. First you have to remove the driver (right-click Start, choose Device Manager, right-click the bad driver, and choose Uninstall) or uninstall the patch (Start > Settings > Update & security > Advanced options > View your update history > Uninstall updates > pick the bad patch and click Uninstall). In rare cases, a specific driver or update might temporarily cause issues with your device, and in this case you will need a way to prevent the problematic driver or update from reinstalling automatically the next time Windows Updates are installed… If a driver or update you are being offered is causing system crashes or instability and Windows was operating correctly prior to that update, you can follow these instructions to prevent the unwanted driver or update from being installed. I set out to see how Microsoft's patch blocking program, wushowhide.diagcab, works. But the lack of distinction is troubling. Whether the melding of security and non-security patches is a permanent fixture or merely a marriage of beta convenience remains to be seen. I can't find details about any of the patches in KB 3074663, 3074661, 3074665, 3074667, or 3074674 - we have to take Microsoft's word for it. In the final stretches of the build 10240 beta, though, that distinction has been thrown to the wind the five "Security Updates for Microsoft Windows" all include patches to build 10240 itself. For example, the Software Update Services list at KB 894199 puts "security content" and "non-security content" in completely separate sections. In the past, Microsoft has drawn a very firm distinction between security patches and other updates of various kinds. In my experience, some of the tricks work, others don't. That said, Microsoft has provided certain tricks you can use to block specific patches after the fact. Microsoft will test these future updates with its Insider program first, before rolling them out more broadly over the coming months.We now know for sure that Windows 10 build 10240 - and presumably the final version of Windows 10 - will force updates on Windows 10 Home and Windows 10 Pro PCs that aren't connected to a patching server. In the future Microsoft will be updating Windows 10 regularly, especially the built-in apps that power most experiences in the operating system. While the RTM process is a milestone for Microsoft, especially almost 20 years to the day the company finalized Windows 95, it’s really just one step in a new model that will see Windows act more like a service. Microsoft will first roll out build 10240 to its Windows 10 testers, and the company is now focused on patches and fixes that will also roll out alongside the OS launch.
Microsoft is now pushing for existing and new device owners to upgrade to Windows 10 as part of a new marketing campaign. While Microsoft is planning to launch Windows 10 on July 29th, new PCs with the software won’t be available until some weeks later. We understand that Microsoft is signing off on the build internally today, and may announce the RTM publicly by the end of the week or choose to ignore the milestone and focus on the launch. Sources familiar with Microsoft's plans tell The Verge that the software giant has selected build 10240 as the final release to manufacturing (RTM) copy, allowing PC makers to start loading the software onto new machines ready for release. Microsoft has now finalized Windows 10, ready for its release later this month.