https://www.bleepingcomputer.com/news/security/microsoft-publishes-solutions-for-windows-10-search-issues/

Microsoft today published a support article detailing solutions on how to fix problems in Windows Desktop Search after previously fixing a known issue where users reported not receiving results on Windows 10, version 1903 devices.

The company previously fixed this issue where searching did not return any results and Cortana had high CPU usage or sudden CPU spikes with the release of the Windows 10 KB4515384 cumulative update.