Product or patch installation or server upgrade required error in Health Analyzer.

Product or patch installation or server upgrade required error in Health Analyzer.

Issue: Product or  patch installation or server upgrade required error in Health Analyzer.

Explanation: All required products must be installed on all servers in the farm, and all products should have the same patching and upgrade level across the farm

Cause: Some of the Patches\hot fixes which are required are no installed in the Server.

Resolution: Please verify what are the missing Patches in server by compared to another server in same farm.

• Check if there are any pending updates and restart all the servers.
1. Log on to one server.
2. Verify that the user account that is performing this procedure is a member of the Administrators group on the local computer.
3. On the Start menu, click Control Panel, click System and Security, and then click Windows Update. If there are any pending updates or a restart is required, schedule the updates or restart the computer.
4. Repeat the previous steps on all servers.

Resolution 2: Ensure that All the Updates are installed in the SharePoint server which is Missing and Run the PSConfig.exe.

I hope the above information will help you to resolve the issue, in case of any queries/questions regarding the above mentioned information then please let me know. I would be more than happy to help you as well as resolves your issues, Thank you.