https://wccftech.com/windows-10-cpu-bug-added-in-the-known-issues-fix-coming-mid-september/ > Earlier this week, we reported another issue that was spotted in the latest Windows 10 May 2019 Update. The second August cumulative update, which is an optional, non-security update, brought with it a Cortana/SearchUI.exe bug that resulted in some users experiencing high CPU and memory usage. > Then, users reported that they weren’t receiving Search results. “Search box is there but when searching something, only a black box is shown without showing any results,” a user had written.