In section 9, lab exercise question 3, I don't think it retrieves the hotfix for remote computer but its own. My question is am I missing something , why does it not produce results if it is accepting input pipeline of property computername
This should work. The first part of the expression is writing a custom object to the pipeline that has a Computername property. This property can be bound to the Computername parameter in Get-Hotfix because it accepts pipeline binding by property name.