Answer: Express Maintenance will run under WindowsXP and later (example 7 & 10). Express Maintenance does require that you use Microsoft SQL Server as the database engine.
You can purchase the full version of SQL Server or you can use the free Express Edition. Express Maintenance will work with all versions of SQL Server including the very latest edition. However we recommend using SQL Server 2014 and later for new installations.
For system requirements, we recommend using the system requirements for the version of SQL Server you choose to use.