While most other versions of Windows 10 got patched two days ago, Microsoft today released a new cumulative update for the original version of Windows 10. KB4491101 is for version 1507.
It’s rare that the original version of Windows 10 gets more than one cumulative update in a month, but that’s exactly what’s happening. After versions 1703,1709, and 1803 all got patches two days ago, version 1507 is getting a patch today.
