If your device is running Windows 10 version 1903, May 2019 Update, then to reset the search feature, use these steps:
To fix the search functionality with the Settings app, use these steps: And you can perform this task from the Settings app or Command Prompt. If you're having problems searching on Windows 10 and restarting your device doesn't resolve the problem, then you can use the Troubleshooter settings to diagnose and fix the most common issues. Restart your PC and you should be back where you started. The same can be done for steps 16 and 17, with a 1 in the CortanaConsent data field. To undo the process above, repeat steps 13 and 14, but type a 1 in the BingSearchEnabled data field to re-enable Bing. This is a temporary fix while Microsoft addresses the core root of the problem, and it's recommended that users undo the changes once Search is working again as intended. This should bring Windows 10 Search back online, at least with local results. Source: Windows Central (Image credit: Source: Windows Central)
