It's present in SMP 7.0 SP5.. I can't guess when they added it. Version is 7.0.8641. You should consider upgrading to access the new filter.
Here's the resolved query. I noticed it includes Windows XP Embedded, and win32, so perhaps you'll want to modify the query for your purposes.
SELECT
[vri1_Computer].[Guid] AS [_ResourceGuid]
FROM
[vRM_Computer_Item] AS [vri1_Computer]
INNER JOIN [Inv_AeX_AC_Identification] AS [dca2_AeX AC Identification]
ON ([vri1_Computer].[Guid] = [dca2_AeX AC Identification].[_ResourceGuid])
INNER JOIN [vComputerResource] AS [ajs3_vComputerResource]
ON ([vri1_Computer].[Guid] = [ajs3_vComputerResource].[Guid])
WHERE
(
(
([ajs3_vComputerResource].[IsManaged] = 1)
AND
(
([dca2_AeX AC Identification].[System Type] = N'Win32')
OR
([dca2_AeX AC Identification].[System Type] = N'win32')
)
AND
([dca2_AeX AC Identification].[OS Name] LIKE N'Microsoft Windows XP Embedded')
)
)