https://wccftech.com/hold-on-windows-10-cpu-bug-fixed-but-search-broken/

Microsoft delivered September Patch Tuesday fixes to Windows 10 May 2019 Update last night, bringing fixes to several security issues along with the CPU spike bug, as we just reported. It appears that while the patch may have resolved the high CPU usage issue, it didn’t fix the associated Search and Start menu problems and may have exacerbated them for some users.

Some users have reported experiencing Start menu and Search problems after installing last night’s Build 18362.356 (KB4515384). One Windows 10 May 2019 Update user confirmed receiving the following error when typing in the Start menu.