Well, it only seems to happen when I am using Office. Once when a window was not maximized, I closed it to be able to see the change. An icon that was visible on the left side of the screen ended up in the middle immediately after the window closed.

Another issue, which may not be associated, is three times in Outlook, an icon from behind the window became visible through the window. The area was the same square as the icon.

It could have been coincident and maybe the problem is configuration but the only pattern I am seeing is when I am using Office.

If it is configuration, do you have any thoughts?
Have you heard of this problem?
Maybe Office Pro 2010 is not compatible with Windows 7?