It’s still much too early to install the April patches. Details coming in Computerworld Woody on Windows. I’m moving us down to MS-DEFCON 2: Patch reliability is unclear. Unless you have an immediate, pressing need to install a specific patch, don’t do it.
from AskWoody https://www.askwoody.com/2019/ms-defcon-2-patching-conflicts-with-sophos-and-avast-are-getting-better-but-aviras-a-no-show-dont-patch/