Norton does not detect any virus with Mr.CAD program, but blocks the installation and / or Mr.CAD’s execution.
Mr.CAD program files are constantly update, so it’s executable files are always new on the Internet.
Turn off Norton Antivirus before the installation, and then installs Mr.CAD. When the installation completes, configures Norton’s Sonar to exclude the folder: C:\Dvptools 7, and C:\MrCAD SA. Also is recommended to include AutoCAD’s (Autodesk) folders as well. Thus AutoCAD will run faster.