shellexperiencehost not installed correctly

In my opinion, you MUST restore a system backup BEFORE installing KB4524147 for the first time, and then install the very latest patch, only then the issue with the start menu was solved. And these issues will be back, after newer patches are installed. Once you have installed this first 'problem' update, you will notice that you have issues with the start menu. My original guess with the first problem update KB4524147 has been confirmed here. In the German version of this post blog-reader Janami25 has left a comment why suddenly people are affected again. I have covered the issues within my blog post Windows 10 October 2019 Patchday (Start menu) issues. However, the September 2019 patchday updates actually fixed these bugs.

These bugs had already kept the affected users in suspense at end of August and in early September 2019 (see Windows 10 V1903: Search and Cortana bug in Update KB4512941 confirmed ()). However, shortly after installing these cumulative Windows 10 updates, some users discovered that the Start menu, Desktop Search, and Notification Center no longer works. One of the goals was to fix the printer issues, which occurred with some systems since the updates at the end of September 2019 and October 3, 2019. As of October 8, 2019, Microsoft has released a bunch of cumulative security updates for Windows 10.

Shellexperiencehost not installed correctly