NIS 2010 LiveUpdate

Just a small point out of interest ...

 

I've noticed that when running LiveUpdate (where it has found a small number of updates to install), it will install all the updates except the last one very quickly ... but the last one seems to take ages (perhaps between 30 and 60 seconds before it says that it has completed).  Is this normal?  Does anyone know what it is doing at the end - perhaps some sort of housekeeping after it has installed all the updates?

 

Regards.