This is a known problem in the DTU application launcher program.  To resolve the problem: -  Double click on your "My Computer" desktop icon -  Right click on your CD Drive which has the DTU CD inserted, and then click "Explore" -  Locate the file "IntoxCBT" * Double clicking this file will launch the DTU application ** To create a working desktop shorcut for this application, right-click on the "IntoxCBT" icon and then (left) click on "copy".  Next, close the folder, find an empty place on your Windows desktop, and press your right mouse button.  Next, select (left click) "paste shortcut". This issue has been fixed in DTU version 3.01 and does not affect DTU 3.01 and later versions.