Windows Updates fail to install when your PC hardware is not compatible with the software update. This is usually based on issues Microsoft knows, and the feedback it gets from OEM and Windows Insiders. Windows Update comes with its own kill switch built into the KB patches or any update which triggers in case of hardware compatibility issues.
This issue has majorly popped up for Windows 7 and Windows 8.1 machines which were due to upgrading to Windows 10. It triggered this kill switch for Intel 7th generation processors, including Sky Lake and Kaby lake architecture, and the AMD Ryzen processor line. Because of this, no more updates were rolling out for these PCs.
How to block the unsupported hardware popup in Windows Update.
I googled and found an open source program called wufuc v0.7.1.81. I installed it and it worked. I had 102 windows updates. No more annoying pop up.
Download open program: https://github.com/zeffy/wufuc/releases/download/v0.7.1.81/wufuc_setup_x64.msi
Download in zip file: https://github.com/zeffy/wufuc/releases/download/v0.7.1.81/wufuc_v0.7.1.81.zip
Some people have found removing one or all of the below KB patches resolved the issue and allowed them to continue receieving updates.
I did not have have any of these KB patches in my list but I still had the annoying pop up.
KB4012982 KB4015549 KB4054521 KB4012218