The ‘Microsoft.ACE.OLEDB.12.0’ provider is not registered on the local machine

Error reported by an ASP.Net web application that uploads an Excel (.XLSX) file on On 64-bit Windows Server 2008 with 64-bit Office 2010.

Installing the “Microsoft Access Database Engine 2010 Redistributable” on the server did not fix the problem but installing the “2007 Office System Driver: Data Connectivity Components” did.