Payment Software uses helper/prerequisite applications. Your computer must properly support the items below if you intend to use all the functionality of the product. " The Microsoft .NET Framework 2.0 is required for the security and encryption subsystems to function. " The Microsoft SQL Desktop Engine (MSDE) or SQL Server 2005 Express Edition (depending on version) is required to operate the user account database. You do not have to install the database system on the same computer on which the Payment Software/ICVERIFY GUI or User Manager is installed, but you must use either the built-in MSDE/SQL Server 2005 support or a 100% SQL Server-compatible database instance to run the user database.