Welcome Lynn Pulte,
I understand how frustrating it can be after upgrading multiple devices to Windows 11 24H2, Start Menu search enters a continuous loading state and does not return results, while temporarily recovering after resetting the Search package or terminating the related process.
Before proceeding, could you please clarify:
- Are the affected devices using roaming profiles, folder redirection, FSLogix, or any profile management solution?
- Does the issue occur for newly created local administrator accounts on the same device?
- Is this machine joined to a domain, or is each machine just a personal device?
Besides, similar Start/Search issues have been reported by other users after Windows 11 updates, you can check this link: Windows update 24H2 Windows start search not working - Microsoft Q&A
Looking forward to your response.