The problem with storing the information on the PC is that you cannot do it unless the PC is connected and powered on.

In this specific case where you want to exclude PCs from the updates, you must use a centralised solution.

Additionally when you want to check the status of the PC you need it to be switched on and available - you cannot read the registry of a laptop which is disconnected from the network [Smile]

It raises a good point though. The update mechanism should check for a (registry?) key and reset the status' if not present. This would catch for example a PC which is re-imaged.