Hello peggyB,
I too get that message when I shut down my computer. I have not found any solution yet. My comp still works fine and no side effects so far. The only info in my event log is,
error event id 1512
windows cannot unload your registry file. The memory used by the registry has not been freed. This is often caused by services running as a user account, try configuring the services to run in either the local service or network service account.
I did read where anti virus or other programs running as windows is shutting down, did not seem to serious. But what bugs me a little is I cannot find info on event id 1512, all I find addresses 1524 and 1517 that is related to this issue.
But as I said I am not having any problems from it otherwise and it randomly occurs.
Mayge some of these good folks can help us figure this out!!