You can recreate the report in the report builder.
Name: Chart: Windows operating systems
SQL syntax:
Select Top 1000000 tsysOS.OSname,
Count(tblAssets.AssetID) As Total
From tblAssets
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join tsysOS On tblAssets.OScode = tsysOS.OScode
Where tblAssetCustom.State = 1 And tblAssets.Assettype = -1
Group By tsysOS.OSname
Order By Total Desc