Waves,
That is helpful. I will look at the Lion release notes.

I started to look at the Apple boards. People are talking about the Lion version being the transition to Apple's brand new operation system.

Lion is out in Beta version. Some have problems. They are talking about backing up to the the previous install as you mentioned.
That is tricky for me. I don't want to do that -- especially since I did not back up with Time Machine before I did the install of Snow Leopard.
Hubby could do a reinstall on his own computer, but he can't do it for mine. The mouse is ok today. Maybe I need to find an Apple person to do the reinstall for me.

I need to sit on this for a while.

M.