Try this.
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SELECT
vc.Name AS 'Computer Name'
,vc.[User] AS 'Primary Owner'
,vc.[OS Name]
,vcol.[Description]
,vhw.Model
,vhw.[Identifying Number] AS 'Serial Number'
FROM CollectionMembership cm
INNER JOIN vComputer vc ON cm.ResourceGuid = vc.Guid
INNER JOIN vHWComputerSystem vhw ON vhw._ResourceGuid = vc.Guid
INNER JOIN vCollection vcol ON vcol.Guid = cm.CollectionGuid
WHERE vcol.Name IN ('ALL Laptops')
ORDER BY [Computer Name]
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