SQL Express (Compact Version) doesn't use the "=" in the case statement
Here's the full code:
Select Top 10000 tblAssets.AssetID,
tblAssets.AssetUnique,
tblAssets.Domain,
tsysOS.OSname,
tblOperatingsystem.Lastchanged,
tsysOS.Image As icon,
tblOperatingsystem.Version As Build,
Case tblOperatingsystem.Version When '10.0.10240' Then '1507'
When '10.0.10586' Then '1511' When '10.0.14393' Then '1607'
When '10.0.15063' Then '1703' When '10.0.16299' Then '1709'
When '10.0.17017' Then '1803' Else '?' End As Release
From tblAssets
Inner Join tblOperatingsystem
On tblAssets.AssetID = tblOperatingsystem.AssetID
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join tsysOS On tblAssets.OScode = tsysOS.OScode
Where tsysOS.OSname = 'Win 10' And tblAssetCustom.State = 1
Order By Build,
tblAssets.AssetUnique