This problem seems to be only on my desktop (have not checked the laptop) since it does not appear on my two tablets. Here it is, on occasion, it will just freeze and no matter what key I use nothing happens other than the screen sort of does a "grey out". By that I mean I can see what is on the screen but it is like looking through the fog at it. The "hard drive activity" light is on solid during these specific periods, and the little blue circle is on the screen. My own opinion is that something/some program is activating when this happens. I just do not know which one nor where to look to find it and shut it down/remove it. One additional item is that when this happens at the end of it the "notification bell" sounds just as if I had received an email but there is nothing in the email box. Any thoughts on where this is and how do I get to it to stop it?