I have come upon a server that has SQL Server Express 2008 R2. This should never have been used since they have a fully licensed copy of SQL Server 2008 R2 Standard. Is it possible to upgrade this instance to SQL Server 2008 R2 Standard? I would prefer to see the SQLEXPRESS instance completely gone and returned to MSSQLSERVER. I also would prefer to retain all the users and security and databases that have been created under the SQLEXPRESS instance.