Go to the desktop icon that no longer works and click properties. Look at
the path. See if that is where the program is located. I added a DVD
player/burner to my computer and it changed my existing CD drive from M: to
E:. Whenever I clicked on a desktop icon that used the CD drive I got an
error message. When I clicked on properties, I noticed that the computer was
being directed to the wrong place. I changed the M to E and everything
worked again.