SharePoint Server 2010 Trial Period for this Product has Expired

A lot of people suggest adding the application pool account used by SharePoint 2010 to Local Administrators group, which does solve the problem. However you will receive a warning from the SharePoint Health Analyzer.

Microsoft’s advice does not help.

You may want to try the following command as suggested by Javi (run it with the SharePoint installation user)

psconfig.exe -cmd secureresources

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