Hotfix info can be found in tblQuickFixEngineering within the Lansweeper report builder. A basic report is shown below. Replace "YourKB" with the hotfix you're after.
Select tblComputers.Computername, tblComputers.ComputerUnique,
tblComputers.Domain, tblQuickFixEngineering.Description,
tblQuickFixEngineering.HotFixID, tblQuickFixEngineering.InstalledBy,
tblQuickFixEngineering.InstalledOn, tblQuickFixEngineering.Lastchanged
From tblComputers Inner Join
tblQuickFixEngineering On tblComputers.Computername =
tblQuickFixEngineering.Computername
Where tblQuickFixEngineering.HotFixID = 'YourKB'
Order By tblComputers.ComputerUnique