You most likely want computernames starting with 'cc'
Computername: integer field, used for the linking to other tables:
Computerunique: unique field domain\computername\siteid
Computer: name of the computer (this was field computername in 3.x)
Change report to this:
Select Top 1000000 tblComputers.Computername,tblComputers.Computerunique, tblComputers.Username,
tblComputers.LastknownIP, tblComputers.LastActiveScan,
tblOperatingsystem.Description
From tblComputers Inner Join
tblOperatingsystem On tblComputers.Computername =
tblOperatingsystem.Computername
Where tblComputers.Computer Like 'cc%'
Order By tblComputers.Computer