Yes, in a blue color - along with a circle with a line through it.
When I turned back on, as soon as the Acer sign came on, I started tapping F8. The little dots kept circling for a long time, screen went black for a few seconds and then the password XXXXX came on. I typed in the password XXXXX now the mouse works. My husband had before turned his computer off and on twice with no change.
Since this is the second time the mouse has frozen, could his fingers be slipping and hitting a key or keys that make the mouse freeze?