Warning Vista and Windows 7 Windows do not allow writing files in the Program Files directory so instead of installing Ditel on C:Program Files (x86)Ditel put the program directly on the root of the C:Ditel disk when of the installation.
The Norton antivirus completely unjustifiably prohibits the installation and use of Ditel. Please replace it with "Microsoft Security Essential" (free for less than 20 workstations).
Microsoft is the only one to have a real interest in the disappearance of viruses and to have a global vision of the Windows world, an essential condition for eradicating viruses.