Hi again. How we determine this is sort of a trade secret, or at least to the extent we\'re able. We can contact you about it if you\'d like, through the email address you signed up with.
But yes, it should be very accurate and comes from what Windows itself is reporting. If you see \"Server w/SQL Server\", then that should be a server OS (like W2K3, W2K Server, etc.) and it should have some kind of SQL Server product installed and open to use, but not necessarily in use. Workstations can also have SQL Server installed, be it MSDE, etc. Ones that say \"Primary DC\" should really be your Primary Domain Controller, as well as the Backup Domain Controller. We\'ve never seen or heard of these being inaccurate so it should be relied on.