After installing the update I kept getting Windows Defender Controlled Folder Access warnings from different processes.
The Controlled Folder access history in Windows Defender is now overloaded and crashes when you attempt to view it.
I have tried reinstalling CIS (initial install had folder protection on, the uninstall (with uninstall tool) and reinstall had it turned off), running CIS diagnostics and running a SFC scan, all come back fine.
If you want logs please PM me.