Provide Windows version, or which Custom build you are using
Include screenshot if possible
If Search bar has stopped working, try to enable it under
services.msc
Press Windows key + R and type
services.msc and press Enter
Browse for Windows search service
Stop it and Set startup type to Automatic
Press Ok to close
If the issue persists, you might have a malware issue.
Perform a full scan with good antivirus software.