The installer of Enterprise Console 5.2.x has referred you to this article due to your current version of Microsoft SQL Server not being compatible with Enterprise Console 5.2.x.
First seen in
Enterprise Console 5.2.0
The SQL Server version, as part of your current install is too old to be used with Enterprise Console 5.2.x. Enterprise Console 5.2.x requires a minimum of SQL Server 2005.
What To Do
We recommend you upgrade the SQL Server instance in use by Sophos to a later version. If you are unsure about which SQL Server instance is being used, see article: 113030.
The following Microsoft articles detail how to upgrade to later versions of SQL Server:
Note: For more information on the supported versions of SQL Server see article 118635.