Well I added your report to the report editor and added the tblwarranty and tblwarrantydetails. Seems to work just fine.
Select Top 1000000 tsysAssetTypes.AssetTypeIcon10 As icon,
tblAssets.AssetID,
tblAssets.AssetUnique,
tblAssets.AssetName,
tblAssetCustom.Manufacturer,
tblAssetCustom.Model,
TsysChassisTypes.ChassisName,
tblAssets.IPAddress As IP,
tblAssets.Lastseen,
tblProcessor.Name,
tblWarranty.ShipDate,
tblWarrantyDetails.WarrantyStartDate,
tblWarrantyDetails.WarrantyEndDate,
tblWarrantyDetails.ServiceType,
tblWarranty.LastWarrantySuccess
From tblAssets
Inner Join tsysAssetTypes On tsysAssetTypes.AssetType = tblAssets.Assettype
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join tblSystemEnclosure On
tblAssets.AssetID = tblSystemEnclosure.AssetID
Inner Join TsysChassisTypes On TsysChassisTypes.Chassistype =
tblSystemEnclosure.ChassisTypes
Inner Join tblProcessor On tblAssets.AssetID = tblProcessor.AssetID
Inner Join tblWarranty On tblAssets.AssetID = tblWarranty.AssetId
Inner Join tblWarrantyDetails On tblWarranty.WarrantyId =
tblWarrantyDetails.WarrantyId
Where tblAssets.AssetID Not In (Select tblSoftware.AssetID
From tblSoftware Inner Join tblSoftwareUni On tblSoftwareUni.SoftID =
tblSoftware.softID
Where (tblSoftwareUni.softwareName Like '%Sophos%' Or
tblSoftwareUni.softwareName Like '%Guardian Edge%' Or
tblSoftwareUni.softwareName Like '%Symantec Endpoint Encryption%'))
And tblAssets.Lastseen <> '' And (TsysChassisTypes.Chassistype = 8 Or
TsysChassisTypes.Chassistype = 9 Or TsysChassisTypes.Chassistype = 10) And
tblAssets.Assettype = -1
Order By tblAssets.AssetUnique