As I said there are two "Warnings" shown every time I turn off the computer.
In double clicking the first warning this message shows:
"Windows saved user Desktop\Mel registry while an application or service was
still using the registry during log off. The memory used by the user's
registry has not been freed, The registry will be unloaded when it is no
longer in use.
This is often caused by services running as a user account, try configuring
the services to run in either the LocalService or NetworkService account."
In double clicking the second warning this message shows:
"Windows cannot unload your classes registry file-it is still in use by
other applications or services. The file will be unloaded when it is no
longer in use."