There's nothing I hate more than a computer thinking for me. That's not your job, that's mine! Just execute the instructions I tell you and move on. In Windows 7 - some jerk at Microsoft decided it would be a good idea to cleanup the shortcuts to servers or other computers off my desktop - no, it's not the desktop cleanup wizard - it's something else. Don't do it!
Once a month, it takes my icons to servers in the server room and just deletes them once a month or so. So I have to turn off the scheduled task. I don't know what else that task does, but it's not going to be doing it any more.
First image shows my missing icons, second image shows how to stop this.