It sounds as though a particular icon could not be created on your system during the upgrade, for whatever reason. The most obvious thing to check is how much empty space remains on your hard drive.
Then you can try, as the message suggests, to completely remove HA (i.e., the program files, not all your scores!) from your system and then perform a fresh installation.
If the deletion/reinstallation doesn't work, run a check of your hard drive for bad sectors. It couldn't hurt, and might help. It's odd that one icon file out of many would fail to be created, and that is just the sort of odd error that a failing disk sector can cause.