Okay, I have not seen a solution yet for DWG Trueview 2014 not installing with the error message "Operating System not supported". I have tried everything that I have seen in the community and still can't get past this issue. I am running on a 64 bit system and have removed everything associated with AutoDesk from my PC. I have the latest versions of everything required (.NET, Windows 7 Professional, IE, etc.) and still can't get this to work. Any help would be greatly appreciated.
Most common problem would be using a 32-bit installer with a 64-bit operating system, or vice versa.
Interesting. Just for shiggles, try the 32-bit installer. If that still fails I recommend posting in the Installation board. You'll get more help with this specific problem there.
Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.